The fleas you see are only 5% of the flea population you have. The rest are eggs, larvae and pupae. Get some capstar which is a box of 6 pills from petco and it will kill fleas in 30 minutes. Put frontline, advantage or advantix on also. The pills last 24 hours each and it takes 72 hours for the frontline and the others to become 100% effective. Nip it in the bud or it could cost a lot more money and much more grief. The pills are digested and work through the blood stream so it works that fast but the others work through the hair follicles so it takes much longer.