Even if you don’t have pets, rodents, squirrels, and other wildlife may bring fleas to your yard where you could pick them up and bring them into your home. The bite and feed on blood, and reproduce rapidly. This is another pest which much be eradicated in stages, to kill current and future (flea eggs and larvae) pests in both your home and yard. Eggs can live in your carpet at least 20 days, to hatch and re-infest your home and property.