Flea meds applied to your cat's skin or taken by mouth can kill fleas for one to three months ... If you're worried about chemicals in the house, try a natural citrus spray.

Natural vs. synthetic ... Oral flea control products are given to your cat by mouth to kill fleas. Some pills kill fleas for up to a month; others require more frequent application to continue ...

Options like environmental management, chemical treatments, and natural alternatives can effectively kill fleas in your yard.