He is about 1 year old and has been eating weened rats for quite some time. my usual store where I buy his food didn't have any of his usual size rat, so i got 2 adult mice, which wouldn't come close to putting a bulge in his gut, but its better than not eating. the mice shouldn't intimidate him, but he won't even strike. He's not shedding and I've had him since he could fit in the palm of my hand easily. Have had him for a year, that's why i guessed his age at +-1 year. please give me some reasons why he won't eat. thank you.