Stop fleas on your cat as soon as you find them! Fleas will quickly become a nuisance and even a health risk to your cat, because they can cause him to become anemic, cause him skin damage and even give him internal parasites. You need to act quickly to get rid of fleas on your cat or kitten as well as doing everything you can to prevent future flea infestations.
Treat your mature cat with a spot-on flea treatment such as Advantage to kill any remaining fleas and prevent future infestations. If you have a young kitten or would prefer a less-toxic flea treatment, use a flea treatment such as Sentry Natural Defense natural flea and tick powder for cats and kittens.
Keep your house well vacuumed to pick up any loose fleas, larvae and eggs. You can put a flea collar in your vacuum bag to kill fleas you vacuum up, but it is best not to put one on your cat due to the possible adverse side effects. Instead, keep your cat indoors to help her from encountering more fleas. The less exposure your cat has to the outdoors, the less likely she is to pick up more fleas.