Why wont my Ball Python eat now?

Ok, I've had a Ball python for about 3-4 months now and he was eating fine. In fact we went from feeding frozen pinkies (when we got him) to frozen fuzzy mice in just a week or two. Then we decided we would try feeding him live mice. We did this because we checked out every possible thing on the internet about them, and we red that live was better then frozen. So he seemed to love the live mice and would often eat as many as 3 at a time. We asked the pet store what size and they told us hoppers at first then the next two times we went they said we should upgrade to regular or large mice. We also looked up on the internet and it said to feed them as much as they would eat. But when it came time for him to shed he was having problems, so we tried our best to keep up the humidity and we bought moss for the cage. (The damn pet store said it was a good idea) and ever sense we put the Moss in his cage he has refused to eat. So now we have taken the moss out and even taped up all but one side of the cage so their is less interference for him. Our kittens would try to get to the mouse as well. We are now trying something that we red/ watched a video of about keeping the snake in isolation for 7 days without any human interaction, accept for putting clean water in his home, and so far its been 4 days. I'm really worried about my Python and I could use some more ideas. We have tried almost everything. Scenting the mice to smell like gerbils, we tried tempting him with frozen mice again, we are keeping the temperatures up like we need to. I just don't want to end up having to force feed him. And please, only NICE comments, I don't appreciate bitchy or rude comments and I will not respond well to them. Thanks!!!! :)