Cat fleas are the most common flea found on both cats and dogs.  They are wingless insects with bodies flattened from side to side and with long powerful hind legs for jumping.  The Cat Flea is a blood feeder as the adult, and a scavenger as the larva. The adults remain on the animals they feed on unless physically forced off, and may live up to a year. The female lays the eggs on the host animal and these eggs fall off to the floor or other surface below. The eggs hatch in a few days and the larvae begins to feed on organic debris it finds. Under ideal conditions the time from egg to adult can be as short as 2 weeks, or it may take several months if there is no host activity to stimulate some of the pupa to hatch to the adult stage.