Frontline or Advantage are good flea control products that are applied directly to the animal (dog or cat). You need to make sure to get the right dose for your pet. I've heard horror stories of people accidently putting the dog dose on their cats.....way too much for a smaller cat's body. The Frontline controls fleas and ticks. Advantage is just for fleas. You might talk with your vet about which one will be better for your situation.

Good luck! There is absolutely nothing worse than fleas!!!!!