How to tell if your pet has fleas.

How to Get Fleas off your Cat or Dog with a Flea Comb

What You Need:

What To do.

How it works: When you comb your pet, the flea comb catches fleas between its teeth. Then you stick the comb into the water, before the fleas can wiggle out and escape. The detergent lowers the surface tension of the water, so the fleas can't capture any tiny bubbles of air. Without detergent, they would live a very long time under water, and maybe float up to the surface and jump out. With detergent, they sink and eventually die.