I tried ACV and although it did repel the fleas as soon as the smell was gone the fleas came back. My dog is on Lufernuron, it's a capsule that destroys the waxy material (Chitin) flea coat is made out of. Once the Chitin is destroyed the fleas are exposed then you can easily kill them. I also use Nitenpyram the generic of Capstar (money is tight) these kill the fleas in 24hrs, I will use 1 tablet a week until my infestation is gone. Along with that I have been vacuuming along with other products for the carpet and furniture.