Actually birds eat hot peppers. The heat has no affect on them since they don't salivate.No on habanero. Only (some) humans seem to like capsaicin.
Go with seaweed and carrots. That'll give you all vitamins and minerals a criter would need.
Decades ago I used to make my own flake foods for that very reason. While it was cheaper I found the commercial stuff has more nutrients and was in fact better.