I have used this product in the past with good results, but this time I was less than pleased to say the least. The medication rolled right off the dog and what was left on her did nothing to repell fleas.Then I was left with a dog who is highly alergic to flea bites unprotected and was out $30+ to boot.If I had a video camera I'd upload a picture of all the flea bites on my poor dog's stomach!