Donnam
Well-known member
I have been giving my dogs Sentinel for many years and my dogs have never had fleas. Sentinel is for heartworms and fleas. I'm not sure, but I think it causes fleas not to be able to reproduce. Last year I got a new vet who recommended that I use Advantage, the liquid you squeeze along their backs, in addition to Sentinel, because it also works on ticks. I really don't like the stuff you apply topically, so I haven't been doing that, but we never get ticks anyway.