I purchased the new natural flea and tick treatment by Sentry- Natural
Defense, that goes on the same way as advantix. Has anyone ever tried it?
Is it effective? IT IS Potent smelling.

While it may repel live fleas, it does not attack the full life cycle of a
flea. As far as parasites go, I'd rather get rid of them altogether. We have
seen animals, too, who have had skin reactions with it which have become
infected. The scent can sometimes also cause issues with the pet.

Some people like it. You'll just have to try it. Follow directions well and
don't apply to other species.