Cats and dogs of any age.
Ear infections are common and painful problems for pets. In cats and dogs, ear infections typically are opportunistic and not contagious. They often occur when the ear’s immune system is disrupted by allergies, moisture, poor air circulation, or diseases such as feline AIDS. Under these conditions, bacteria and yeast that normally live harmlessly in the ear are able to proliferate to the point of infection.
Cats and dogs.
Carsickness is a common problem in cats and dogs. Pets suffering from carsickness show symptoms including salivation, vomiting, and diarrhea. Two factors play a role in carsickness. The first is true motion sickness. The second is anxiety or stress related to being in a car.
Fleas can infest dogs, cats, rodents, and other mammals. People can be bitten by fleas as well.
Fleas are a parasitic pest of dogs, cats, and other animals. They are blood sucking insects. Minor flea infestations can lead to severe skin and health problems in dogs and cats. Major infestations can be life-threatening.
Primarily dogs; very rarely cats.
Chocolate contains two compounds, caffeine and theobromine, that are poisonous to dogs. Caffeine and theobromine are related compounds, and have similar effects on dogs.
Consumption of small or moderate quantities of caffeine and theobromine leads to mild symptoms of agitation and nervousness. Dogs that ingest large quantities of the two toxins may suffer irregular heartbeats and even death.
Primarily dogs; occasionally cats
Heartworm disease affects dogs most frequently. Cats suffer from heartworm disease less often but are still at risk. Heartworms have been found in people in rare cases.
Puppies and kittens. Rarely, adult cats and dogs.
Coccidia are microscopic intestinal parasites of dogs and cats. They are extremely common, but they very rarely cause symptoms in adult animals. In puppies and kittens, they are a frequent cause of diarrhea.
Untreated, severe cases of coccidia in young animals can lead to profuse diarrhea, dehydration, and serious illness. However, most cases of coccidia do not have these consequences.
Cats, dogs, puppies, and kittens.
Roundworms (often simply called worms) are extremely common in pets. In dogs and cats, worms may cause no symptoms whatsoever, or they may cause diarrhea and other gastrointestinal problems. Many safe and effective treatments and preventatives are available to keep pets free of worms.
Hypothyroidism is common in middle-aged and older dogs.
Hypothyroidism is a disease of the thyroid gland. The thyroid gland, located in the neck, produces a hormone called thyroid hormone. Although thyroid hormone plays a complex role in the body, its main effect is to increase the rate of metabolism. Hypothyroidism causes reduced production of thyroid hormone. Therefore, the main problem in hypothyroidism is reduced metabolism.