Were the mice he was getting at the store live? If so you should try going back to live till he starts eating. The fact that the F/t are falling apart may be turning him off. Also, he has had a stressful transition (first a new home then a shed and then a new substrate) so he may still be acclamating to his new home.


Give him a good week (don't touch him) and then try a live mouse (assuming live is what he was eating at the store).