I use the BioSpot on Ozzy. He hasn't had any ticks for a little while now. (We were infested with ticks not too long ago.... GROSS).
Frontline doesn't repel ticks, it only kills the ones that are already on them. I've heard good things about Advantix, too. Advantix repels.
If you have cats, after you apply it, do NOT let the cat lick the dog. The pesticide in the flea/tick drops for dogs is deadly to cats.
Ozzy - Chocolate Pom
-Fastest 2012/2013 U-FLI Pomeranian
"In a perfect world, every dog would have a home and every home would have a dog."