Did you know the average lifespan of a flea is about six weeks? It is estimated that only 1 per cent of a population of fleas is in the adult stage at any given time,( this is the stage where they are active and possibly biting your dog, or cat.) There are many natural ways of protecting your pets that don't involve chemical treatments. Naturpet D-Wormer is a natural antiparasitic. Call Pat to order.