Coughing in a cat is not normal. Although people can occasionally cough to clear their throats or from a chest cold, cats should not. Coughing in a cat is a sign of either feline asthma or less commonly, heart worm disease or migrating parasites. If your cat has a cough that is regular, it is most likely feline asthma and can be dangerous. It can be diagnosed from symptoms, x-rays and may require additonal tests such as a blood test to rule out heart worm, a stool test to rule out worms and a sampling from the airway called a tracheal wash. Sometimes a trial on corticosteroids works to determine the cause if the coughing subsides. SO, please have your pet evaluated for the cough- because... cats shouldn't cough!