Mimi will scratch the area & Momo will roll around like he's got a crazy itch that he can't scratch! I usu hold them until it dries. If I blow on it, they'll turn around like a bee landed on them or something!
I've been using Frontline Plus for two yrs on Mimi & she's fine. Make sure you buy it from your vet cuz I heard that the ones you buy online are not effective & they're investigating it...or something like that.