Do you know what type of prey and size it was that your BP last ate from the store/breeder? If it was a mouse, I'm wondering if your BP is refusing it because your trying to feed a rat which is the same issue I'm experiencing. The only thing that jumps out to me is that you might of tried to re-feed too soon after the initial rejection. I would try letting the rat thaw near the cage for a good while and hopefully the smell will entice your BP enough to put him in 'the mood' to eat. Good luck and keep us posted.