Tapeworms live in the digestive tracts of vertebrates as adults and often in the bodies of various animals as juveniles. In a tapeworm infection, adults absorb food predigested by the host, so the worms have no need for a digestive tract or a mouth. Large tapeworms are made almost entirely of reproductive

Seizures are common in dogs, but more unusual in cats. Seizures are just symptoms which can occur with many kinds of diseases. They can happen because of diseases outside the brain or inside the brain. Low blood sugar that can happen with an overdose of insulin or with a tumor of the pancreas can cause

The rupture of the cruciate ligament is the most common knee injury in the dog. This injury has two common presentations. One is the young athletic dog playing roughly who acutely ruptures the ligament and is non-weight bearing on the affected hind leg. The second presentation is the older, overweight

Luxating patella is a condition where the kneecap (patella) moves out of its normal position. Luxating patella is one of the most common knee joint abnormalities of dogs, but it is only occasionally seen in cats. It may affect one or both of the knees. In some cases it moves (luxates) towards the inside

Canine distemper is caused by a virus that is shed in bodily fluids of infected animals. The virus affects primarily the lungs, intestines, and nervous system. Symptoms of the infection can include coughing, diarrhea, vomiting, inappetance, dehydration, weight loss, seizures, and encephalitis. Secondary

Vertigo is a syndrome in the elderly dog, which can be very frightening to the owners. The dog is suddenly afflicted with a balance problem, usually staggering, but occasionally unable to stand, and more rarely actually rolling over and over. There is a tilting of the head to one side and nystagmus,