The cat flea belongs to the insect order Siphonaptera which in its adult stage is an obligatory hematophage.Adults of both sexes range from 1–2 mm long and are usually a reddish-brown colour, although the abdomens of gravid females often swell with Family: Pulicidae. Shop Chewy for low prices and the best Adult Cat Flea & Tick Treatment! We carry a large selection and the top brands like Sergeant's, Sentry, and more. Find everything you need in one place. FREE shipping on orders $49+ and the BEST customer service!
Medicines your cat eats. The pill nitenpyram (Capstar) kills adult fleas on your cat within 30 minutes. It doesn’t have any lasting effects, though. Spinosad (Comfortis) is a fast-acting chewable that starts killing fleas before they lay eggs. It provides a full month of flea . Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that survive as external parasites of mammals and birds.Fleas live by consuming blood, or hematophagy, from their hosts.Adult fleas grow to about 3 mm (0.12 in) long, are usually brown, and have bodies that are "flattened" sideways or narrow, enabling them to move through their host's fur or Class: Insecta.