Like others said watch his weight, it is very important. I had a some of mine shy away from a few of their meals. I would not force anything on them and eventually they all eat but one. He was eating medium sized rats and then would not touch anything larger then an adult mouse. This lasted for a month but he was eating but last week he finally took a small rat. I will not try anything bigger until I see him really getting food aggressive. Did you get a reply from the breeder? But then again what are they going to really say?