DOGS · Condition guide
Portosystemic shunt in dogs: what real veterinary cases show
A portosystemic shunt in dogs, often referred to as a liver shunt, is a condition where blood bypasses the liver, preventing it from detoxifying the blood effectively. This can be a congenital issue, meaning it is present from birth, or it can be acquired later in life. Liver shunts are relatively uncommon but can have serious health implications if not addressed.
Owners typically notice symptoms such as poor growth, lethargy, and neurological signs like seizures. Early detection is crucial because untreated liver shunts can lead to severe complications, including hepatic encephalopathy, where toxins affect the brain.
What vets typically check for
- Initial blood tests to check liver function and ammonia levels.
- Ultrasound imaging to visualize the liver and blood vessels.
- Advanced imaging like CT or MRI for detailed assessment of the shunt.
- Liver biopsy may be performed to assess liver tissue health.
- Surgical intervention or medical management to correct or manage the shunt.
Not a replacement for veterinary care. Use this to walk into the conversation prepared, not to self-diagnose.
Real cases from the veterinary literature
Peer-reviewed reports our semantic search surfaces for Canine portosystemic shunt (liver shunt). Click into any case for the full abstract — or run a personalised search with your pet's exact details.
- Ultrasonography and portography in the diagnosis of shunt portoazigos in a dog - case report
Arquivo Brasileiro de Medicina Veterinária e Zootecnia · BR
An 8-month-old male Yorkshire Terrier was brought to the vet with neurological symptoms, including head pressing, unsteady movements, tremors, and brief episodes of blindness and deafness. The vet used ultrasound and a special imaging technique called portography to find an unusual blood vessel connection (portoazygos shunt) that was affecting the dog's health. After confirming
- Case Report: Acute Ehrlichia canis induced Severe Hepatitis and Its Management in a Fijian Dog
Media Kedokteran Hewan · 2026 · ID
A 4-year-old female Boerboel was brought to the vet after showing signs of not eating, being very tired, having dark, tarry stools, high fever, and dark urine for three days. The vet found that she had ticks on her body and ran blood tests, which showed severe liver issues and confirmed a tick-borne disease called ehrlichiosis. The treatment included a 28-day course of doxycycl
- [Bacterial cholecystitis with concurrent hypothyroidism in a mixed-breed dog].
Tierarztliche Praxis. Ausgabe K, Kleintiere/Heimtiere · 2026
A 6-year-old neutered male mixed-breed dog was brought in with symptoms like jaundice (yellowing of the skin), fever, and abdominal pain. The vet diagnosed him with bacterial cholecystitis, an infection of the gallbladder, and started treatment with antibiotics. However, the infection didn't fully resolve, and the dog later showed signs of weight gain and skin problems, leading
- Prevalence, breed predispositions, and culture and sensitivity results of bacterial hepatobiliary infections in dogs in the United Kingdom.
Journal of veterinary internal medicine · 2026 · United Kingdom
A group of 126 dogs in the UK were diagnosed with bacterial infections in the liver and bile ducts, with Miniature Schnauzers and Border Terriers being more likely to develop these infections compared to mixed-breed dogs. The most common bacteria found were Escherichia coli and Enterococcus species, with many infections showing resistance to multiple antibiotics. However, most
- The lidocaine/monoethylglycinexylidide test is a valuable alternative to protein C activity to determine shunt closure after surgical attenuation of extrahepatic portosystemic shunts in dogs.
Veterinary journal (London, England : 1997) · 2026
A group of dogs with extrahepatic portosystemic shunts (EHPSS) underwent surgery to close the abnormal blood vessels, and researchers tested two blood tests to see which was better at confirming the closure. They found that the lidocaine/monoethylglycinexylidide (MEGX) test and another test (GX) could effectively identify dogs with ongoing shunting after surgery. The GX test wa
- Mural gallbladder haematoma in a Parson Russell Terrier.
Australian veterinary journal · 2026 · United Kingdom
A 5-year-old Parson Russell Terrier was brought to the vet after experiencing sudden vomiting, diarrhea, loss of appetite, and lethargy. The vet found signs of jaundice and abdominal pain, and tests showed liver issues. An ultrasound revealed thickening of the gallbladder wall, suggesting a serious problem. During surgery, the vet discovered a large, discolored gallbladder and
Frequently asked questions
- What causes a portosystemic shunt in dogs?
- Portosystemic shunts can be congenital, meaning the dog is born with it, or acquired due to liver disease. Congenital shunts are more common in certain breeds.
- How is a liver shunt treated?
- Treatment can involve surgical correction to redirect blood flow through the liver or medical management with diet and medications to control symptoms.
- Can my dog live a normal life with a liver shunt?
- With appropriate treatment, many dogs can live a relatively normal life. Early diagnosis and intervention are key to managing the condition effectively.