Corny is very pretty! Now to get his appetite loss figured out. I'm assuming that by "large mice" in the quote below, we're not really talking about adult mice? Feeding twice a week sounds like a recipe for regurge, unless we're talking about pinks/fuzzies???
they're not exactly "large"; they're 25g on their best day, not ex-breeders or anything. they're just f/t mice from the pet store.