Archie has never been on flea control. His breeder said she's never had a flea problem. About a week after I brought him home I found a couple on him, so at his first visit with my vet I got him some. I've always used Advantage with Caleb and had great results. Well the vets office switched from carrying Advantage to this new kind called Vectra. It is very strong smelling, and ever since I put it on him he's been itching (or should I say trying to itch) he can't reach his back very well. I've checked his skin and theres no rash or irritation. WHAT SHOULD I DO? Wash him and buy Advantage somewhere else? Give it some time? I applied Calebs last dose of Advantage the same day and he's fine. HELP! I FEEL TERRIBLE FOR MAKING MY LITTLE GUY ITCHY!