Have fleas infested your home? Need effective flea control products? Fleas are parasites that survive by feeding on the blood of warm-blooded animals. So when you have an infestation, both you and your pet will serve as hosts. Infestations are not limited to homes with pets; they can also happen in homes without them. That’s because fleas can also be spread by haired pests such as rodents, possums, feral cats and dogs.