My ball python is about 4 months old and has already gone through its shedding, it likes to eat small fuzzy mice and I always defrost it well and keep it pretty warm, it has a heat lamp and the temperature is always at 78-80 degrees, it has a bowl of water and aspen shavings really nice setup
Do you have a warm side? Or is the whole setup 78-80?
Fuzzy mice are way to small at his age, he may be looking for something bigger, try a small adult mouse.