Hello, I've recently adopted a 4 1/2 foot python named Joey, I weighed him and he is at 1080g, which from my research I know is under weight, I know from his previous owner that he won't take rats, but loves mice, I tried a rat anywas and ya, he wouldn't take it, snatches up the mice tho. So I've been feeding him 4 adult mice every week, should I move him up to 5 or more, and sense he won't eat rats, is it ok for him to just eat mice? Thanks for any help!