Liver Shunt (Portosystemic Shunt) in Dogs: the Puppy That Stays Small, the Bile Acid Test, and What India Actually Has

Signs of Congenital portosystemic shunt

The 11 signs to watch for are listed below. Any one of them is a reason to consult your nearby vet; none of them is a diagnosis.

• The smallest puppy in the litter, and it stays small
• Poor muscle development and slow, stalled growth
• Dullness, staring into space, or pressing the head against a wall
• Circling, wobbliness, or sight that comes and goes
• Seizures, sometimes the first thing an owner notices
• Behaviour that gets worse an hour or two after a meal
• Vomiting, diarrhoea, or a picky, unreliable appetite
• Drinking and urinating more than the littermates do
• Straining or blood in the urine from ammonium urate stones
• A very slow, prolonged recovery from sedation or anaesthetic
• Excessive drooling, more often described in cats than dogs

Breeds on this site that document this condition

Each breed page below carries the figure for this condition with its denominator and its source. The 9 breeds listed are the ones on this site that document it, not a ranking of risk.

What a liver shunt is, and which puppies are born with one

A liver shunt is an abnormal blood vessel that carries blood from the gut straight past the liver instead of through it, so the toxins the liver should strip out reach the brain instead. Most are congenital, the dog is born with the vessel, and most affected dogs are small-breed puppies.

Blood leaving the intestines, spleen and pancreas is supposed to enter the portal vein and be filtered by the liver before it goes anywhere else. When a portosystemic shunt is present, part of that blood bypasses the filter. The American College of Veterinary Surgeons describes the second consequence, which owners rarely hear about: the liver is also deprived of the hepatotrophic factors that make it grow, so it fails to reach normal size, and that hepatic atrophy produces hepatic insufficiency on top of the circulating toxins. A shunted liver is therefore both bypassed and small.

Two different diseases share the name. A congenital shunt is a single abnormal vessel present from birth, either a ductus venosus that failed to collapse or a vessel outside the liver that developed abnormally and stayed open. Acquired shunts are multiple small vessels that open later in life because severe liver disease such as cirrhosis has raised the pressure in the portal system. This page is about the congenital kind, because that is the one an Indian owner meets in a puppy that is not thriving.

The condition is uncommon and it is not evenly spread. Across 2,400 dogs diagnosed at United States veterinary teaching hospitals over 22.2 years, congenital portosystemic shunts were reported in 0.18 percent of all dogs and 0.05 percent of mixed-breed dogs. The same analysis records something that should change how you read older advice: the proportion of diagnoses rose from 5 in 10,000 dogs in 1980 to 5 in 1,000 dogs in 2001. That is a tenfold rise in recorded diagnoses in twenty-one years, and it reflects imaging and awareness at least as much as biology.

Thirty-three breeds carry raised odds, and five of them carry most of it

Thirty-three breeds were significantly more likely to have a diagnosis than mixed-breed dogs, and odds ratios were calculated only for breeds with at least 100 accessions, which quietly excludes every breed too rare to reach that threshold. The Yorkshire Terrier had the greatest total number of diagnoses of any breed, and a separate record, pedigree and breeding-trial analysis put the odds ratio for the breed at 35.9 times that of all other breeds combined.

Read that table with one correction in mind. The column is the proportion of that breed's hospital accessions that carried the diagnosis, not the proportion of the whole disease, and the breeds an Indian buyer is most often offered sit across the range. The Shih Tzu, which is everywhere in Indian metros, is not in that top five at all; it appears instead in an Australian series as a breed significantly over-represented among portosystemic vascular anomalies, with no within-breed percentage published.

Signs are usually evident in young animals, and the MSD Veterinary Manual states plainly that they generally manifest as neurological disturbance from hepatic encephalopathy. The word usually is doing work there. In the largest single-breed review that exists, 11,061 Yorkshire Terriers at one hospital, the median age at diagnosis was 2.7 years with an interquartile range of 1.0 to 5.7 years. Half of those dogs were therefore diagnosed after their second birthday, which is late for a condition present from birth.

What you can see at home, and how far to trust the after-dinner rule

The sign that sends most owners to a vet is behaviour rather than sickness. A puppy that stares at a wall, circles, or presses its head into a corner an hour after dinner is describing a liver problem, and the clinical signs list above is the one to scan first.

The most common clinical signs are stunted growth, poor muscle development, abnormal behaviour such as disorientation, staring into space, circling or head pressing, and seizures, with excessive drinking and urinating, vomiting and diarrhoea less common. Other findings a vet may pick up include enlarged kidneys and urate bladder stones, with raised liver enzymes and unusually small red cells on the bloods.

The post-prandial link is real, but its absence proves nothing

Almost every page on this subject tells you that signs worsen after a protein meal, and it is worth knowing exactly how firmly that is stated. VCA hedges it carefully, saying behavioural clinical signs may only occur after eating high-protein meals. The MSD Veterinary Manual's account of the condition does not mention meals at all, describing the signs as neurological disturbance usually evident in young animals. So the after-dinner pattern is a strong clue when you see it and not a rule-out when you do not.

What actually predicts hepatic encephalopathy has been measured. In 120 dogs with a congenital portosystemic shunt and a graded encephalopathy score, the variables that predicted the presence of encephalopathy on multiple regression were plasma ammonia concentration and the systemic inflammatory response syndrome score. Neither of those is meal timing. An infection or an inflammatory episode can tip a stable shunted dog into encephalopathy without any change in diet, which is why a shunted dog that becomes suddenly worse needs examining rather than a smaller dinner.

The Indian record agrees on the signs while adding its own pattern. Across 140 dogs with hepatopathies investigated at centres in Rewa, Surat and Jabalpur with the Indian Veterinary Research Institute at Izatnagar, ataxia, hypersalivation, head pressing, seizure and behavioural changes were associated with cirrhosis or intrahepatic portosystemic shunt, and melena with ascites and bilateral hind-limb oedema were the combination most often seen with the same two diagnoses.

One more sign belongs on the list because owners notice it and rarely report it. Dogs with a liver shunt often take a long time to recover from anaesthesia. A puppy that was unusually slow to wake after a routine neuter or a dental is giving you information, and it belongs in the record before the next procedure.

Before the appointment, write things down. A vet who sees a wobbly puppy for ten minutes cannot see the pattern you have been living with for a month, and the pattern is most of the diagnosis. The notes worth taking are listed below.

• Weight every week, and the weights of any littermates you can get.
• Timing of every odd episode, and what the dog had eaten in the two hours before it.
• Duration of each episode and how the dog was between them.
• Water drunk in a day, measured rather than estimated.
• Urine, including straining, blood, or gravel on the floor.
• Anaesthetics, including how long recovery took after any sedation.
• Video of one episode on a phone, which is worth more than any description.

How a liver shunt is diagnosed, and which test rules it out

To diagnose a liver shunt, a vet runs paired serum bile acids and fasting ammonia first, then images the vessel with ultrasound or CT angiography. Blood tests say whether the liver is being bypassed; only imaging says where the vessel is and whether it can be operated on.

The bile acid test is run as a pair. Blood is taken after an overnight fast, the dog is fed a small meal, and a second sample is taken two hours later; in dogs with a shunt one or both results are raised. Cornell's diagnostic laboratory puts the interpretive threshold at more than 25 to 30 micromoles per litre in dogs, and states that dogs below 25 do not have evidence of hepatic pathology on biopsy while dogs above 25 usually do.

The best modern measurement of how well these tests work comes from 192 dogs presented with a suspected congenital shunt, in which the diagnosis was confirmed in 147 and excluded in 45. Fasting ammonia had the best combined performance at 77.4 percent sensitivity and 93.3 percent specificity, abdominal ultrasound managed 80.8 percent and 90.0 percent, and paired serum bile acids reached 100.0 percent sensitivity and a 100.0 percent negative predictive value, which made them the best test in that population for excluding a shunt.

Two studies disagree about bile acids, and the disagreement is the useful part

A larger and older study points the other way, and both are worth carrying. Records of 337 dogs in which fasting ammonia and bile acids were measured at the same time, 153 with portosystemic shunting and 184 without, gave ammonia a sensitivity of 100 percent for portal vein anomalies against 92.2 percent for bile acids, and a specificity across the whole population of 89.1 percent against 67.9 percent. The number that matters most is the last one in that paper. Restricted to dogs that already had liver disease, ammonia held a specificity of 89.3 percent while bile acids fell to 17.9 percent.

Put the two together and the practical rule is clear. A normal paired bile acid result is powerful evidence against a shunt, and a raised bile acid result in a dog that already has liver disease barely narrows anything, because most sick livers raise it. Bile acids are a screening test that excludes; they are not a diagnosis.

There is a second reason the test is run as a pair rather than as a single post-prandial sample. Most dogs have a higher post-prandial than fasting bile acid concentration, but up to 20 percent of dogs have the reverse, a higher fasting value, because of a recent meal, gall bladder contraction during fasting, or delayed gastric emptying. In one in five dogs the provocation the test is built on does not behave as expected, and only the pair catches that.

Imaging: what finds the vessel, and what the sources disagree about

Sources do not agree on how good ultrasound is. MSD states that abdominal ultrasonography is reported to be 100 percent sensitive for intrahepatic shunts, less so for extrahepatic ones, and that sensitivity depends on the skill of the ultrasonographer. The 192-dog series measured 80.8 percent overall and found that additional imaging was required to visualise the shunt in almost 20 percent of cases, and that the localisation can be got wrong, particularly for extrahepatic shunts that do not insert into the prehepatic vena cava. Both statements can be true, because MSD's caveat about operator skill is precisely what a multi-case series averages over.

This is why CT angiography matters. It is the scan that maps the vessel before a surgeon opens the abdomen, and the one investigation on this list that an Indian owner can actually cost, because a government veterinary college publishes the price. The cost section below prints it.

Inside the liver or outside it, and why that decides everything

Whether the shunt sits outside the liver or inside it decides the operation, the prognosis and the bloodwork. Extrahepatic shunts are commoner, easier to reach and carry the better outcome; intrahepatic shunts are the large-breed problem and the harder one.

The split has a denominator. A single specialty hospital reviewed its cases from January 1980 to December 2015 and reported 377 dogs with extrahepatic portosystemic vascular anomalies against 87 with intrahepatic ones. That is 464 dogs in total on our arithmetic, so roughly four in five were extrahepatic. Referral caseloads over-represent the unusual, so treat this as the ratio a specialist sees rather than the ratio in the general dog population.

Body size predicts which one. Small-breed dogs usually have extrahepatic shunts and larger breeds usually have intrahepatic shunts, and extrahepatic shunts are easier to repair surgically. MSD names the breeds on each side, listing Yorkshire Terriers, Cairn Terriers, Havanese, Maltese, Pugs and Miniature Schnauzers among the toy breeds with extrahepatic shunts, and Irish Wolfhounds, Labrador and Golden Retrievers, Australian Cattle Dogs and Old English Sheepdogs among the large breeds with intrahepatic ones.

The two types also look different on a blood test, which is new evidence most pages have not caught up with. Comparing 26 dogs with intrahepatic shunts against 35 with extrahepatic shunts, gastrointestinal signs were far commoner in the intrahepatic group at 81 percent against 34 percent, as were anaemia at 31 percent against 6 percent, small red cells at 77 percent against 29 percent and pale red cells at 77 percent against 49 percent. A vomiting, anaemic, microcytic dog is more likely to have the shunt inside the liver.

One finding from the Australian series deserves more attention than it gets, because it inverts the usual advice. Of the 233 dogs reviewed in Sydney, 214 had a single congenital shunt with patent portal vasculature, while nine had portal vein aplasia, seven had multiple acquired shunts from portal vein hypoplasia, one had biliary atresia and one had microvascular dysplasia. The author's conclusion is the sentence to remember: unusual or inoperable shunts are much more likely to occur in breeds that are not predisposed to congenital portosystemic shunts.

Read that against your own dog. A Maltese with shunt signs most likely has the common, operable, single extrahepatic vessel. A breed that does not appear on any shunt list, showing the same signs, is more likely to have something the surgeon cannot simply attenuate, which is an argument for imaging before anyone commits to an operation.

Surgery and medical management, with the numbers from both

Surgical attenuation produced longer survival than medical management in every cohort that has compared them, and medical management is a real treatment rather than a waiting room. This section gives both sets of numbers with their denominators, because in much of India only one of them is reachable.

The treatment of choice for a single shunt is surgical attenuation, narrowing the vessel with eventual closure, or full ligation where the surgeon judges it safe. Complete ligation is never done instantaneously in every patient, because closing a shunt in a dog whose portal vasculature is underdeveloped can cause life-threatening portal hypertension. The surgery is technically challenging, and a primary-care vet will usually refer.

The three ways a shunt is closed, and what the evidence says about choosing

An ameroid constrictor is a metal band with an inner ring of casein that absorbs abdominal fluid, swells and presses the vessel shut, usually closing the shunt within three to four weeks. A cellophane band provokes an inflammatory reaction that scars the vessel closed over months. Trans-venous coiling, used mainly for larger intrahepatic vessels, places coils inside the shunt through a puncture in a neck vein, held by a stent.

A network meta-analysis pooled 48 studies of treatment for congenital extrahepatic shunts and reached an uncomfortable conclusion. The quality of evidence was low and the risk of bias high, and the only statistically significant comparison between techniques was the superiority of the ameroid constrictor over a thin film band at P equals .003; no other comparison reached significance. The authors describe the evidence base for choosing a treatment as remaining weak despite recent publications. Anyone who tells you confidently that one method beats another is going beyond what has been shown.

Surgery does not always succeed in doing what it set out to do. In 152 dogs with extrahepatic shunts, complete suture ligation was possible in 46 of the 64 dogs, 71.9 percent, in which surgical attenuation was attempted. Roughly one operation in four therefore ended in partial ligation or no ligation, and that is a conversation to have with a surgeon before the day, not after.

Survival: surgery wins, and the size of the win is disputed

Two prospective cohorts from overlapping research groups both favour surgery and disagree by a factor of nearly three on how strongly. In 126 dogs followed for a median of 579 days, 18 of 126 died as a result of the shunt, and the hazard ratio for medical against surgical treatment was 2.9 with a 95 percent confidence interval of 1.1 to 7.2. In 124 dogs followed for a median of 1,936 days, 97 treated surgically and 27 medically, the hazard ratio was 8.11 with a confidence interval of 4.20 to 15.66. Both are published, both favour surgery, and the honest summary is that surgery is better by somewhere between a little and a lot.

Both studies agree on something that changes what you do next. Age at diagnosis did not affect survival in the first, and neither age at diagnosis nor shunt type affected survival rate in the second. The authors of the earlier paper drew the conclusion explicitly, that early surgical intervention was not essential and that dogs which do not settle on medical treatment can be operated on later. For an owner who needs six months to reach a surgeon or to raise the money, that is the most important sentence on this page.

VCA puts the headline surgical figure at a survival rate of 84 to 95 percent for most dogs with extrahepatic shunts and names no study for it. Treat it as a range rather than a measurement.

Medical management is a treatment, and the commonest page on this subject understates it

Medical management aims to cut the bacterial production of toxins in the gut and to reduce what is absorbed. Lactulose is an osmotic laxative that lowers the bacterial load in the colon and shifts large-intestinal pH so that less ammonia is produced and absorbed. An antibiotic is often added to suppress the bacteria that generate those toxins. The diet should give high-quality protein and may need to be moderately restricted. This page prints no dose for any of them, because the dose is set by the veterinarian who has examined your dog.

Now the numbers the ranking pages leave out. MSD reports a median estimated survival time of about three years for non-surgical management with a protein-restricted diet with or without lactulose, with owners reporting improved quality of life and fewer signs. In 152 dogs, the medically managed group reached a median survival time of 1,730 days. And in a 1998 series of 27 medically managed dogs, 14 were euthanased with a mean survival of 9.9 months, while nine were still alive at a mean follow-up of 56.9 months and every one of those had passed three years from diagnosis.

That 1998 series appears to be where a widely-repeated claim comes from, and it has been flattened in the retelling. VCA tells Indian readers that about one-third of medically treated dogs live a relatively long life and that over half are euthanised within 10 months of diagnosis. The underlying series does have 14 of 27 euthanased, but 9.9 months is the mean survival of the euthanased subgroup only, and the nine survivors who all passed 36 months have disappeared from the summary. The paper's own conclusion is that a significant proportion of medically managed dogs have a good prognosis.

The 2026 finding that matters most where surgery is out of reach

A lifetime-survival analysis of 377 dogs with extrahepatic and 87 with intrahepatic anomalies at one specialty hospital compared management strategies against dietary copper intake, and produced the result an Indian owner should take to a vet. Complete ligation gave the best survival age, 12.5 years for extrahepatic and 12.0 for intrahepatic cases. But the survival age of medically managed dogs fed a copper-restricted liver diet, 9.7 years extrahepatic and 6.5 years intrahepatic, did not differ from dogs that underwent partial ligation. Unstratified medically managed dogs did worse, at 9.1 and 5.0 years, so the diet is doing measurable work.

The sequence a well-run case follows is set out below, and it is worth knowing in order so that you can tell where your own dog has got to.

1. Stabilise the dog medically first, because the goal before surgery is to reduce the gut bacterial load and the toxins they make.
2. Confirm the bypass with paired bile acids and fasting ammonia.
3. Localise the vessel with ultrasound and, where it is available, CT angiography.
4. Decide with a surgeon whether the shunt is single, extrahepatic and operable.
5. Attenuate the vessel gradually rather than closing it in one step.
6. Recheck bile acids afterwards to see whether the shunt has closed, because partial ligation often needs a second operation months later.

What a liver shunt work-up costs in India, from the rate cards that publish one

Two Indian government veterinary institutions publish rupee prices for the scans and surgery grades a shunt work-up needs, and Madras Veterinary College publishes two sheets that disagree with each other. Neither institution prices a bile acid assay, and no Indian source prices shunt attenuation surgery at all.

Start with the one that matters most. The scan that maps a shunt before surgery is a contrast CT of the abdomen, and the Department of Veterinary Surgery and Radiology at Madras Veterinary College in Chennai publishes its charges as approved by the Hospital Management Committee. CT Abdomen Plain is Rs 3,000 and CT Abdomen Contrast is Rs 4,000, with CT Myelogram at Rs 5,000, plain abdominal radiographs at Rs 300 for up to two views and other contrast studies at Rs 800. Surgery on the same sheet runs Rs 1,000 for minor, Rs 3,000 for major and Rs 5,000 for specialised or emergency work.

The same college's Department of Clinics publishes a separate hospital fee structure under a column headed COST IN RUPEES, and the numbers do not match. There, CT SCAN-PLAIN is Rs 2,000, CT SCAN-CONTRAST is Rs 2,500 and CT SCAN-CONTRAST WITH REPORT is Rs 3,000, while MAJOR SURGERY is Rs 1,500, MINOR SURGERY Rs 500, EMERGENCY SURGERY Rs 2,500 and SPECIALIZED SURGERY Rs 3,000. Small animal registration valid for seven days is Rs 100 and a combined haematology, biochemistry, urine and culture line is Rs 50.

Bonbeno publishes both rather than picking one, because both are live on the university's own site on the same day Tamil Nadu Veterinary and Animal Sciences…. The practical reading is that a contrast CT at a government veterinary college in Chennai costs somewhere between Rs 2,500 and Rs 4,000, and you should ask which department is billing you.

Run the exchange-rate test before trusting any of these. Rs 4,000 divides to 47.40 United States dollars at 84.38 and to 54.05 at 74, and Rs 2,500 divides to 29.63 and 33.78. Neither pair lands on a round dollar figure, so this is a rupee-native government fee schedule and not a converted foreign price list.

What the other government institutions price, and what they do not

The Referral Veterinary Polyclinic at ICAR-IVRI in Izatnagar publishes a 45-line charge table for surgical procedures and diagnostic imaging with effect from June 2024, in rupees and marked plus tax as applicable. In its Pet Animal column a laparotomy is Rs 300, ultrasonography Rs 250, plain radiography Rs 150, a liver function test covering SGPT, total protein and albumin Rs 400, and bilirubin Rs 200. Registering a dog or cat costs Rs 30 in normal hours, Rs 200 after 12:30 pm and Rs 400 after 5 pm or on holidays.

Two absences in that list matter more than anything in it. ICAR-IVRI lists no CT scan at all; its stated diagnostic facilities run to radiography, ultrasonography, clinical biochemistry and haematology, endoscopy, laparoscopy, an image intensifier, echocardiography and haemodialysis. And no bile acid assay appears on the IVRI schedule, on either Madras Veterinary College sheet, or on the Bihar Animal Sciences University Veterinary Clinical Complex schedule, which prices clinical pathology, culture at Rs 100 per culture and PCR panels from Rs 600 to Rs 1,000 ICAR-Indian Veterinary Research Institute Tamil Nadu Veterinary and Animal Sciences….

What is different in India

India has one published canine liver-disease series, no published canine shunt surgery, contrast CT in a small number of centres, and a small-breed market made almost entirely of the breeds at highest risk. That combination is why the medical-management arm carries more weight here than it does on an American page.

The Indian series is real and no ranking page cites it. Dixit and colleagues investigated 140 dogs with hepatopathies, diagnosed with a battery of tests, across the College of Veterinary Science and Animal Husbandry at Rewa, Nandini Veterinary Hospital in Surat, the college at Jabalpur and the Division of Medicine at the Indian Veterinary Research Institute, Izatnagar. Of those 140 dogs, 82 had primary and 58 had secondary hepatopathies, and the primary group was separated into hepatitis or hepatosis, cirrhosis or fibrosis, and intrahepatic portosystemic shunt.

Four of its findings map straight onto this page. Growth was stunted in the intrahepatic shunt cases. The mean age of dogs with intrahepatic shunt was lower than the rest. Intrahepatic shunt was more prevalent in males while hepatitis and cirrhosis were more prevalent in females. And among breeds, Pomeranians were over-represented for primary or secondary hepatopathies.

That Pomeranian line appears on no Western breed list, and it is exactly the kind of finding a country-specific caseload produces, because the Pomeranian is one of the most widely kept small breeds in Indian cities while the Havanese and the Dandie Dinmont Terrier barely exist here. Treat it as a signal to take liver bloods seriously in a poorly grown Indian small-breed puppy rather than as a prevalence figure, because the paper reports hepatopathies of all kinds rather than shunts specifically.

The Indian absence, with the search and the control that produced it

Beyond that series, the published Indian record on canine shunts is empty, and we can say how we know. Europe PMC was searched on 27 September 2026 with a syntax control: the query for hip dysplasia and Labrador in title or abstract returned 110 records, confirming the field syntax was working, while the same query written in PubMed bracket syntax returned 3 irrelevant records. Against that working instrument, portosystemic shunt with dog, dogs or canine returned 265 records worldwide. The same canine query with India in the title or abstract returned 0, and with India in the author affiliation returned 0. Affiliation searching alone, without the canine terms, returned 190 Indian-affiliated portosystemic shunt papers, and every one inspected was human medicine: transjugular intrahepatic shunts for cirrhosis, Budd-Chiari syndrome, extrahepatic portal vein obstruction and Abernethy shunts in children.

That is a controlled absence rather than a bare one. India has a large and active human hepatology literature on portosystemic shunting and no indexed canine literature on it at all, which also explains why the India-qualified search returns a People Also Ask question about the price of a transjugular intrahepatic portosystemic shunt in India. That is a human interventional radiology procedure. An Indian owner searching for their dog is being shown answers about people. The single India-hosted page in that top ten states that advanced imaging may be needed and that surgeons use ameroid constrictors or cellophane banding, but the words prevalence, specificity, denominator and survival rate do not appear on it anywhere, and it prints no rupee price and no hospital name.

Where the diagnosis is physically possible

Contrast CT is the investigation that decides whether surgery is even discussable, and its availability in the Indian public system is uneven in a way the rate cards make visible. Madras Veterinary College, part of the Tamil Nadu Veterinary and Animal Sciences University, lists Radiology and Computed Tomography as a referral unit of its teaching hospital and prices contrast CT. ICAR-IVRI at Izatnagar lists no CT among its facilities or its charges. Before travelling, telephone and ask whether the CT is working and whether they will scan a dog under general anaesthetic, because a published price is not a working machine.

The screening test has the opposite problem. No Indian government veterinary rate card prices a serum bile acid assay Tamil Nadu Veterinary and Animal Sciences… Bihar Animal Sciences University, yet the assay itself is routine in Indian human pathology: Apollo 24|7 lists a serum bile acid test at Rs 2,819 against a printed maximum retail price of Rs 7,048. The chemistry is not the barrier. The veterinary pathway is. That same listing states the test is available in Hyderabad, Bangalore, Gurgaon, Noida and Chennai, and notes that prices run slightly higher in cities such as Bangalore, Mumbai or Delhi where demand is greater. So the assay is a metro service in India on the human side, and on the veterinary side it is not on a published rate card anywhere.

Finally, the breed market. The small breeds Indian metros actually buy include the Shih Tzu, the Pug, the Maltese and the Yorkshire Terrier, and all four appear on shunt over-representation lists Hunt GB. Effect of breed on anatomy…. The Havanese, which tops the proportion table, is rare here, and the Cairn Terrier with the best population denominator of any breed is rarer still. The risk an Indian buyer is exposed to is real; the breeds carrying it here are simply not the same ones the headline studies were built around.

The prescription liver diet, priced per kilogram in India

The diet is part of the treatment rather than a supplement, and in India it is one imported veterinary-exclusive product that at least three sellers had in stock on 27 September 2026. It costs roughly Rs 1,010 to Rs 1,400 a kilogram depending on seller and pack size.

Non-surgical management of a single congenital shunt means feeding a protein-restricted diet with or without lactulose, and MSD reports a median estimated survival of about three years on it. The manufacturer's Indian page describes what the product is doing: adapted levels of highly digestible vegetable proteins to support liver function in chronic liver insufficiency, a low level of copper to limit its accumulation in liver cells, and a high energy content so that meal volume can be smaller. It is sold in India in 1.5 kg and 6 kg bags and is a veterinary exclusive formula.

The copper restriction is not a marketing line. In the 2026 lifetime-survival series, pathological liver copper accumulation occurred in 9 of 30 biopsies from dogs fed diets supplying 0.40 milligrams of copper or more per 100 kilocalories, while copper-restricted feeding showed no evidence of copper insufficiency and was associated with the survival ages quoted earlier.

Two things fall out of that table. The first is the pack-size penalty. The smallest bag costs Rs 1,400 a kilogram at the same seller that charges Rs 1,142 a kilogram for the 6 kg bag, which is 23 percent more for buying small. On a lifelong diet for a 5 kg dog that difference compounds, so buy the large bag if your dog will get through it before it goes stale. The second is that the sellers differ: the same 6 kg bag is Rs 6,850 at one seller and Rs 6,059 at another, a spread of Rs 791 PetIndiaOnline, Royal Canin Hepatic Dog…, and a third seller discounts the 1.5 kg bag to Rs 1,785 from a regular price of Rs 2,100.

Run the exchange-rate test on these too. Rs 2,100 divides to 24.89 dollars at 84.38 and 28.38 at 74; Rs 6,850 to 81.18 and 92.57; Rs 6,059 to 71.81 and 81.88. None of those lands on a round dollar figure, so these are rupee-native Indian retail prices rather than a converted import list, even though the product itself is imported.

The label on the seller's own listing settles a question Indian owners ask often. The product is not made here: the pack is marked Imported by Royal Canin India Private Limited, at Lotus Corporate Park, Western Express Highway, Goregaon East, Mumbai 400063, and marketed by the same company. The sellers themselves are metro businesses, with Supertails registered at Indiranagar in Bengaluru, Karnataka and PetIndiaOnline at Baguiati in Kolkata, which is worth knowing if you live somewhere a courier reaches slowly and your dog is on a diet that should not be interrupted. PetIndiaOnline prints its price with the rupee symbol as ₹ 6059 against a stated maximum retail price of ₹ 7300. Availability is better than for the equivalent feline urinary diet, which the FLUTD in cats page found stocked in only its least economical pack. Every hepatic variant was marked available at the largest seller on the day we looked, and a second seller printed In Stock. Both require a prescription: PetIndiaOnline carries the notice that a veterinarian recommendation is required and asks you to upload one.

Screening, breeding, and what to ask before you buy a puppy

To screen a puppy for a liver shunt, ask the breeder for a bile acid or blood ammonia result on the litter before you pay. Two national programmes have shown this works at scale, and both also show how easily a single result misleads.

No kennel club or registry runs a shunt scheme, so there is no certificate to ask for and no database to look the parents up in. What exists instead are two breed-club screening programmes run by veterinary schools, and they are the closest thing to a protocol.

Between July 1990 and July 2001, six-week-old pups of the Dutch Cairn Terrier population were screened by measuring venous ammonia, with ultrasonography, autopsy, portal vein angiography or exploratory surgery where hyperammonaemia was found. In total 6,367 Cairn Terriers were screened and 32 males and 26 females had a congenital shunt. Family groups and test matings both showed significantly higher prevalence than the general population, and the authors concluded the inheritance is autosomal and most likely polygenic, or monogenic with variable expression.

The Finnish programme is newer and screens with the test an Indian vet would use. Over one year, 582 Miniature Schnauzer puppies from 121 litters were screened at 6 to 12 weeks by post-prandial serum bile acids, which was 58 percent of all the breed's puppies registered in Finland that year. A raised post-prandial bile acid appeared in 3.3 percent, 19 of 582 dogs, and a shunt was eventually confirmed in 8 of 582, an incidence of 1.37 percent against the 0.18 to 0.76 percent estimated for dogs generally.

The two numbers inside that study that should change how you read your own result

On retesting one to four weeks later with a full bile acid stimulation test, 11 of those 19 dogs had both pre- and post-prandial concentrations back within the reference range and were dropped from further investigation. More than half of the screen-positive puppies were false alarms. If your puppy's first bile acid comes back high, the next step is a repeat, not a diagnosis.

The mirror-image finding is the one that should stop anyone treating a single normal result as a clean bill of health. One dog had a normal post-prandial bile acid at screening and was later diagnosed with a congenital shunt as an incidental finding on CT. In the same study every confirmed shunt vessel originated from either the splenic vein in five dogs or the left gastric vein in three, inserting into the caudal vena cava at the diaphragm, which the authors read as a hint of a shared genetic background.

Breeding out of it is slow because the inheritance is not simple. In Yorkshire Terriers the coefficient of inbreeding was about twice as high in affected dogs as in normal members of the breed, and two affected dogs bred together produced two normal puppies, so the mechanism of inheritance has yet to be established. In Maltese, two matings between affected animals produced shunts in 2 of 8 offspring and six matings between an affected and an unaffected animal produced shunts in 2 of 22, with heritability of the shunt calculated at 0.61 and of raised post-prandial bile acid at 0.81.

What to ask before money changes hands is short, and it is listed below.

• Ask for a bile acid or blood ammonia result on the puppy, or on the litter, in writing.
• Ask whether either parent has ever had liver bloods run, and see them.
• Weigh the puppy against its littermates, and be suspicious of the smallest.
• Watch the puppy for an hour after it has eaten, before you decide.
• Check that the puppy recovered normally from any sedation it has already had.
• Repeat a single high bile acid result before accepting it, because 11 of 19 screen-positive puppies were normal on retest.
• Remember that one normal screening result is not a guarantee, since a confirmed shunt was found on CT in a dog that screened normal.

The rest of the pre-purchase list, including the paperwork an Indian seller should be able to produce, is in the dog breeder checks for India guide, and bringing a puppy home in India covers the first fortnight.

Living with a dog that has a liver shunt

A dog whose shunt has been attenuated, and a dog managed on diet and medication, both need the same thing: a file that follows them to every clinic. Three specific risks follow this diagnosis for life and each one is manageable if the next vet knows about it.

The first is anaesthetic. Dogs with a liver shunt often take a long time to recover from anaesthesia, because the liver that clears the drug is small and bypassed. Every future dental, every neuter, every wound repair needs that on the form. If your dog also carries a drug-sensitivity risk, the MDR1 drug sensitivity page covers the separate problem of breeds that cannot clear certain drugs at all.

The second is stones. Urate urolithiasis is a recognised concurrent finding alongside enlarged kidneys, and a shunted dog that starts straining, passing blood, or urinating in small frequent amounts needs investigating for ammonium urate stones rather than assumed to have a urinary infection. The bladder stones in dogs page covers what happens next.

The third is seizures, and the difficulty is that they look like something else. A young small-breed dog having seizures could have idiopathic epilepsy or could be encephalopathic from a shunt, and the tests that separate them are the ones in the diagnosis section above. The distinction matters because in 120 shunted dogs the presence of hepatic encephalopathy was predicted by plasma ammonia and the systemic inflammatory response score, which means an infection anywhere in the body can precipitate an episode in a dog whose shunt has not changed at all.

Yorkshire Terrier owners have a fourth thing to watch, and it is unrelated. In the 11,061-dog review, severe tracheal collapse syndrome was present in 6.7 percent, 739 dogs, at a median age at diagnosis of 10.0 years, against 0.8 percent for shunts at a median of 2.7 years, and the two conditions appeared together in only 0.05 percent, 6 dogs, which matched the rate expected if they were independent. A Yorkie that had a shunt as a puppy is not thereby protected from, or predisposed to, a collapsing trachea at ten.

What good long-term management looks like

After a partial ligation the job is not finished. About half of dogs partially ligated will scar their shunt closed and about half keep shunting and need a second operation months later, so follow-up bile acid tests and portal scintigraphy are used to monitor which group a dog is in. Full ligation is often possible in animals partially ligated four to six months earlier, once the liver has adapted.

Quality of life, not just survival, has been measured. Across 124 dogs followed for a median of 1,936 days, the frequency of shunt-associated clinical signs was lower in surgically managed dogs than medically managed dogs at every follow-up interval, reaching significance between four and seven years after entry. Owners of medically managed dogs in an earlier series reported stable or improved weight and quality of life on treatment in every case, with liver enzymes falling significantly during treatment.

Keep one page in a folder and photograph it, so it survives a change of clinic. The items worth having on it are listed below.

• The shunt type and where it was, as written on the imaging report.
• The operation performed, the device used and the date, or the note that the dog is managed medically.
• Every bile acid and ammonia result with its date and units.
• The current diet by exact product name, because two Royal Canin products have similar names and different jobs.
• A standing note that this dog metabolises anaesthetic slowly.
• The date of the last urine check for urate crystals.

None of this replaces your own veterinarian. This page exists so that you arrive at the consultation knowing which questions have published answers and which do not, and so that an Indian owner can tell the difference between a number from a study and a number from a search box.