Because you change the conditions does not been they resume feeding overnight it can take time. The stress of multiple housing, than the stress of a new environment it's a lot especially for a young animal.
Have you been handling him?
How big is he exactly?
Actually not really fuzzies are way to small and probably do not spark his interest.I'm not feeding him more than once a week, and the last two times I've tried to feed him I've been using a fuzzy mouse, because I've read that that will entice him more.... but he still just wants nothing to do with it.