I had a run in with fleas and could not get rid of them. I moved into a new house and my roommate has a bunch of cats and a dog; they’ve been having problems with fleas for goodness knows how long. Naturally, that started affecting my boy too. I noticed my dogs weren’t itching as much after applying— they were still itching some, but I didn’t see any fleas after checking them over. One of my dogs has sensitive skin and I was worried this would bother her but she handled it well and it didn’t affect her skin. My one gripe is that it doesn’t seem to last a whole month. The fleas are gone after application but it seems like just a few weeks later BOOM they’re back with a vengeance.