DEAR FURPARENTS, Always check your furbabies for parasites. What Are Fleas? Fleas are tiny parasitic insects that crawl and jump. They eat the blood of mammalian and avian (bird) hosts. There are about 2,500 species of fleas, one of which is the cat flea, Ctenocephalides felis. Symptoms of Fleas in Cats If you observe your cat scratching and aren't sure if fleas are the cause, you can use your fingers or a flea comb to look for scurrying fleas or tiny black specks in the cat's fur. The black spe