I’m very sorry but this made my dog very ill, within about an hour if giving it to him he was throwing up and continued to do so throughout the night. We were packing up to go to the vet when he finally went to his bowl and drank. He had refused to eat or drink prior. Within a few hours he also ate his breakfast and continued to get better. I’m slightly revising my review from 2-3 stars but I’d like to explain that. This company has offered me a complete refund (I didn’t ask for one) and has been working with me to discover why this made my dog sick. I did not start him gradually as directed on packaging. Having said that, I should have known that! The company has also reworked the feeding directions to insure that gradual introduction is clearly marked on packaging. So if I could give a rating on just customer service, it would be a 5 star review, it is obvious to me that they really care and want to do what is right. I will be giving the product another try by gradually introducing it to my dog. It’s hard to give an honest review on the product until I know whether or not it works to repel fleas.