Interesting! I admit I don't know much about the evolution of rodents, although I do know they inhabit many different places on this earth.
I understand the farmers wanting to remain rat-free, but would anyone understand a person who fancies rats and simply wants to keep one as a pet? That's a little strict by my standards, and I've been called harsh, among other things... That is seriously insane! How do you snake keepers feed your pets? Certainly not legally, gathering from the information here...