I have a graziani pastel that for some reason will eat ONLY mice. Stick a rat in there with him, and he retreats to the other end of the feeding uh.. "tub" (plastic rubbermaid storage tub.) But stick a mouse in there, and BAM! it's gone. He is definitely big enough for rats, but for some reason, he just won't eat them. At all. Ever. So...any suggestions on how to get him to eat rats??? I appreciate any and all advice. Thanks!