The vectra 3d and capstar pills I got from my vet. I didn't look on petmeds.com because they needed immediate relief. And yes u can see the dead fleas just falling off. Problem is that the life cycle is about 3 weeks for a flea. So do it then do it again in 2-3 weeks. The pill only kills adult fleas and there will be a new batch starting to hatch almost immediately. For 3 bucks it sure beats the hassle of spraying or bathing them.
so every week and a half or so?