calliecritturs
Posted : 8/13/2006 11:45:19 AM
Lori's right -- Sentinel is for heartworm (and all blood-feasting parasites) and fleas. BUT it's birth control for fleas -- it's not going to 'kill' them. (and it stays in the body only 24 hours -- not systemic which is a good thing)
Sentinel doesn't *kill* fleas at all -- it's milbemycin (same as Interceptor) but it additionally has the same drug in it that the old Program used -- it's an 'egg inhibitor'. It's actually 'birth control for fleas' -- when the flea 'bites' the dog it doesn't die ... BUT when that flea procreates, it's offspring won't have the ability to develop the hard-exoskeleton (shell) that fleas have and the babies can't develop that and they die.
If your dog stays in the same area (never goes out of your yard AT all) then it's great but the second you go out for a walk where new fleas can jump on your dog it's not going to work.
But do also remember that Interceptor (and also Sentinel) protects your dog from more parasites than HeartGuard does. Because it's dosed higher (because it's far safer at higher doses than ivermectin) it kills things like hooks and whips usually. Not completely infallible, but in a case like mine where I *know* my soil was contaminated by hooks and whips at one time, I know Interceptor does a good job of protecting my guys. I usually use it every 45 days rather than monthly.