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• Penetrating Trauma and Gunshot Wounds

  Penetrating wounds can look minor on the surface but may cause severe injury below the skin. A thorough assessment requires sedation or anesthesia and surgery may be required to address the extent of the injury. This handout outlines first aid steps a pet owner can take while transporting their injured pet to the veterinary hospital.

• Penrose Drain Discharge Instructions for Dogs

  A Penrose drain is a latex tube placed into a wound with one or two ends exiting the skin to passively remove unwanted fluid, usually from abscesses or open wounds. This handout provides post-operative wound care instructions for dogs sent home with a Penrose drain.

• Perianal Fistula in Dogs

  Perianal fistula, also known as anal furunculosis is a serious medical condition that most commonly affects German Shepherd dogs. Perianal fistulas are characterized by chronic, purulent, smelly, ulcerating, sinus tracts in the anal region and surrounding skin. More recent studies indicate that the condition is more likely caused by an autoimmune disease. Medical management with immune-modulating drugs is now the preferred therapy. In severe cases, surgery is required to debride or remove as much infected tissue as possible.

• Perineal Hernia

  A perineal hernia is a protrusion of tissue through the muscle of the perineum. Potential causes, clinical signs, and treatment are explained. The prognosis ranges from good to poor, depending on the ability to perform surgery and the pet's response to surgery. Perineal hernias have the potential to be life-threatening.

• Pigmentary Keratitis

  Pigmentary keratitis is a discoloration of the cornea due to chronic inflammation and is most common in brachycephalic breeds. In many cases, complete resolution cannot be achieved, but the condition can be stopped or slowed down if the underlying cause can be identified and treated. Surgery and medications may be used to help address the problem.

• Pneumothorax in Dogs

  Pneumothorax is an accumulation of air outside the lungs, but inside the chest wall. The air outside the lung prevents the lungs from inflating normally, and can lead to lung collapse. There are several variations of pneumothorax.

• Porcupine Quills in Dogs and Their Dangers

  Porcupine quills can puncture the skin and move through muscle, ultimately penetrating into body cavities and internal organs. They contain barbs like fishhooks and tend to migrate inwards instead of being expelled. Do not cut quills or attempt to remove the quills yourself. Seek immediate veterinary care if your dog is quilled. Sedation or anesthesia is required to remove quills safely.

• Portosystemic Shunt in Dogs

  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.

• Post-Operative Instructions in Dogs

  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.

• Prostatic Disease in Dogs

  Prostatic disease can be uncomfortable for a dog, particularly if it causes compression of the urethra or colon. Because there are many diseases of the prostate, it is necessary to perform several tests to determine the exact cause of a patient's condition. This handout provides explanations of the seven most common conditions affecting the prostate and the corresponding approaches to treatment.