Although you may not have seen a flea on your cat, you could still have them.
Infestations start off slowly but increase extremely rapidly.
At any given moment, adult fleas comprise only 5 percent of the total flea population. Mature female fleas lay their eggs, up to 50 each day, during a period of 6 to 8 weeks. Thus, a single female can produce approximately 2100 to 2800 offspring in less than two months. The flea lays her eggs in your cat's hair. As your cat walks throughout your home, he distributes the eggs into the small crevices in your floors and rugs.