 thinking there was one or two that you liked, but most of them are a lot of stuff in them that you don't want the dog to be exposed to, right? I'm not a big fan of collars. I'm more of a natural way. I test my dogs for fleas at least twice a week. How do I test my dogs for fleas? What you do is I take my dogs, I roll them around in a white towel. If I notice any black specks in the white towel, I put those on a moist paper towel.