Timmie, From what I have been told you spray it on WHERE he is biting. My ferret started nipping and I sprayed it on my arm and the next time he nipped me (he licks first so I really didnt get nipped that time) he got a taste of it and pretty much stopped. I dont think spraying it in his mouth is teaching him not to bite. Mishy, Jim, Christina, Sammy and Molly [Posted in FML issue 3148]