I have to ask this and PLEASE dont anyone take it the wrong way. Why does anyone care what kind of rats they have? Unless you are breeding for pets does it matter? If you breed for feed does it matter? I have seen many post here about what kind of rats do I have and its really starting to make me wonder. Im not trying to be rude or even an ass about the question in hand, just curious as to the question. I raise rats for my snakes feed and have some that are solid grey, some half grey half white, some solid black, some half black half white, and some solid white. Ive even got one snake for some reason I can not get her to eat a black rat, but as soon as I throw a solid white one in there she attacks it. So is there a reason to breed or have only one type of rat?