Fleas feed on your pet's blood and make your cat uncomfortable A heavy infestation can cause it to become anemic and unwell. Flea infestations have been known to kill kittens. Some individual animals are allergic to flea saliva and this causes the pet abject misery with constant scratching and self mutilation. The most common allergy dermatitis in cats and dogs is a flea allergy. Fleas also spread tapeworm from one animal to another.

When a cat has fleas they might scratch a lot and their behavior tends to change. Sometimes you might not always notice it. Another sign is if they throw up after they eat or they might not as much and they could also have diarrhea. Do you know of any other flea signs that might be on cats and do you have any medications that you recommend?