Educational Articles
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A portosystemic shunt causes a bypass of blood from the gastrointestinal tract directly into the systemic circulation, avoiding the normal detoxifying process that happens in the liver and reducing nutrient input into the liver. Liver shunts can be congenital defects (failure of closure of the ductus venosus or inappropriate vascular development) or acquired (development of extra vessels caused by portal vein hypertension). Clinical signs include failure to thrive (runt), head pressing or other neurological signs especially after high protein meals, delay in anesthetic recovery, increased urination, and vomiting or diarrhea. CBC and biochemistry can be altered in a dog with a portosystemic shunt (e.g., microcytic anemia, low BUN, glucose, elevated ALT) and urinalysis can show abnormal crystals and possibly infection. Bile acids will be elevated. CT, ultrasound, or other more advanced imaging will confirm and locate the shunt. Initial treatment includes a change to a low protein diet, lactulose to absorb ammonia and other toxins, and antibiotics to change the bacterial population of the intestines. Some dogs do well with medical management; however, many need surgical treatment to gradually close off the shunt. Surgery is very successful and dogs return to normal in 2-4 months.
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Guarding desired items can be a normal behavior in dogs, but when it escalates, the safety of both people and animals is compromised. Exercises to prevent and reverse guarding behavior can be beneficial to any dog. Professional guidance is needed for any dog who repeatedly conflicts with people or pets because of guarding behavior.
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When your cat comes home after an operation, special care must be taken to ensure he remains indoors with restricted activity and cannot lick or chew at his incision site. Monitor your cat for abnormal signs and contact your veterinarian if any are observed.
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Special care must be taken when your dog comes home after an operation to ensure the incision area stays clean and dry and heals properly. Some signs are cause for concern, and if observed, call your veterinarian right away.
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This handout explains post-vaccination sarcomas (also called injection-site sarcomas) in cats. They are a rare consequence of vaccine injections (and other drugs or materials) that can cause a very aggressive form of cancer at the site of the injection. The incidence of this condition, as well as precautions you and your veterinarian can take, are highlighted.
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Feline poxvirus is a relative of the human smallpox virus seen mainly in Asia, Europe, and England. It causes skin lesions around the head, neck, and forelimbs, such as ulcerations, scabs, or abscesses. Cats often recover on their own with no further symptoms unless they are immunocompromised. There is no specific treatment or vaccine. Antibiotics may be used to control secondary infections. The virus can be transmitted to humans but can be significantly reduced by basic hygiene precautions.
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Poxviruses can infect many species of birds, and each species of bird may have its own unique species of poxvirus. This handout explains three forms of the virus: cutaneous, diphtheroid, and septicaemic. Each of these forms has distinct clinical signs. Diagnosis, treatment, and ways to minimize the risk of infection in your bird are explained.
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Prazosin is given by mouth and is used to reduce urinary sphincter tone to relax the bladder and allow easier urination in dogs and cats. It may also be used as a treatment for congestive heart failure, systemic hypertension, or pulmonary hypertension in dogs. Give as directed. Common side effects include lethargy, vomiting, diarrhea, nausea, and constipation. This medication should be used with caution in pets with kidney disease or other conditions that cause low blood pressure, as well as in MDR1-positive dogs. If a negative reaction occurs, contact your veterinarian.
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Although uncommon, cats and dogs are at risk for several diseases during the two months of their pregnancy. Pre-eclampsia occurs if the mothers cannot keep up with the demand for calcium to produce bones and milk. Gestational diabetes can occur due to high concentrations of hormones and result in increased drinking, urination, inappropriate weight loss and lethargy. Mastitis is a bacterial infection of one or more mammary glands that is contracted either through the blood (sepsis) or from the external environment from unsanitary conditions and/or injury from babies’ teeth or nails. Retained placentas can occur and will result in lethargy, pyrexia and abnormal vulvar discharge. Be aware of the signs, symptoms and management for all four conditions.
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Pregnancy in dogs can be diagnosed several different ways including blood tests, radiographs and ultrasound. The benefits and limitations of each test are discussed. Ultrasound is the gold standard for pregnancy detection and assessing viability.