According to the American Heartworm Society, coughing, difficult breathing, fatigue, vomiting and loss of appetite are common symptoms of heartworms in cats. Cats can die suddenly after being infected with heartworms eve... More » Pets & Animals Pets Cats

Common side effects from oral heartworm treatments include diarrhea, vomiting and lack of muscle coordination. Side effects from topical heartworm treatments include hair loss at the application site, diarrhea, vomiting,... More »

Indoor cats can get worms by swallowing fleas, eating mice, or getting bit by mosquitoes that are infected, according to petMD. There are several different worm species, including tapeworms, roundworms and heartworms, th... More »

Symptoms of heartworms in dogs include a decrease in appetite, weight loss, fatigue after moderate activity, a reluctance to exercise and a mild, persistent cough, according to the American Heartworm Society. As heartwor... More »

Symptoms of tuberculosis include a loss of appetite, unplanned weight loss, coughing for three or more weeks or chest pain when coughing or breathing, according to Mayo Clinic. Some people with tuberculosis may experienc... More » Health Pain & Symptoms

Some symptoms of a weak heart include difficulty in breathing, general body weakness, irregular heartbeat, nausea, loss of appetite, impaired thinking and swelling in certain body parts. A weak heart normally leads to he... More » Health Conditions & Diseases Cardiac Health

Symptoms of a toxic liver can include jaundice (yellowing of the skin and eyes), itching, pain in the upper right abdomen, fatigue, loss of appetite, nausea and vomiting, weight loss and dark urine, says Mayo Clinic. Not... More »