my bp just likes mice. Is it a problem if I can't switch him to rats? He eats between 4 and 5 med/lg mice a week. I am wondering if there is a problem with the health benefits of 5 mice over 1 or 2 rats? He has been eating only mice for 5 years and just isn't interested in other things. And honestly, if I didn't have to change I would be glad too. But I will do whatever is best for Sid. Thanks.. elysheva