I use Sentinel on my 3 dogs for heartworm. It also has a flea preventative in it too. The last time I saw a flea on my dogs was almost 10 years ago and I live in South East Texas, where fleas run rampant.

The last camping trip we went on, we tried Frontline for ticks. I didn't find it all that effective. We spent most of the trip, picking ticks off my Collie. The time before that, we used Advantage, that was equally as useless.

Par...