Bug free is the way to be with the Zodiac Flea & Tick Spray for Dogs, Cats, Puppies & Kittens. Armed with the adult killing power of pyrethrins, it also contains the PRECOR Insect Growth Regulator that kills larvae and eggs. This highly effective combination of ingredients provides quick relief from biting pests, and it continues to kill any eggs that have been laid for up to two months—thus killing the life cycle and ridding your pet of those itchy, uninvited guests. The spray formula is easy to apply, by gently misting the entire coat.