I live in tick area. In tick season we often find 10-15 on our dogs a day! (sometimes even more) Needless to say we are constantly de-ticking, dusting, spraying, bathing, dunking, ect. every day all summer. I would watch it for a few weeks and if your really worried about it take the tick to be tested by your vet (if you still have it) Or take your dog in often for checkups so he can detect any illness early on