I have a big, bad, adult male tom cat. I used Frontline on him on July 1. It isn't working. I usually use Advantage but the guy in the pet store convinced me to get this. I want to put Advantage on him now. Will that make him sick? It's only been a week since the application of Frontline. What if I give him a bath first? Thank you!
Wait another week, give him a bath and apply the advantage. It should be ok. vetcare