Being vigilant about flea control is a vital part of being a good pet parent. Fleas are more than an irritant - they are basically used hypodermic needles, spreading disease from one host to another. You must practice flea management continually; otherwise, you will kill the adult fleas, but flea eggs and larvae will continue to hatch. Both the outside and inside of your home needs to be treated - if you merely treat the pets, fleas will continue coming into your home or onto your pet from the environment. The best way to manage fleas is to practice flea control in your yard, in your home, and with your pets.