Fleas - A Persistent Problem! Flea infestation is a persistent problem in pet dogs. Fleas strike when dogs play outdoors. Adult female fleas then feed on the blood and ?shower? eggs everywhere ? on carpets, floor and beds. The lifecycle of fleas thus continues perpetually. If you care for your dog then first thing to do is to vacuum clean your home thoroughly to break the flea lifecycle ? eggs, larvae and pupa. The next step should be to control the flea infestation medically. Bayer Animal Health produces some of the most effective flea fighting medications. Advantage from Bayer is once a month topical flea and lice treatment for dogs and puppies 7 weeks or older.