Alright, for a while I was using the little water spray I have and spraying Rocky everytime he nipped along with an assertive, NO! Now, this worked for a while. But now he's starting to do it again and it doesn't seem to be working. Whenever I use it now, he whimpers slightly and walks away from me. When he comes back later on, he'll start doing it again! This has been going on all most all of today and some yesterday. What's going on here?