I have a question sort of similar to this, if I feed my big female ball python a gerbil of appropriate size, does anyone think she might become too accustomed to that prey item? Thus only wanting gerbils? Lol, I have a lot of frozen gerbils but I am afraid to feed them over my small rats because they are harder to obtain in my area unless I use online resources. My local rat breeder stopped breeding gerbils and gave me some of the last of his stock, but I don't want her to completely switch her diet. I am thinking I shouldn't. But I figured I would ask regardless.
I've never tried, but I have always been told that hamsters and gerbils are very addicting and hard to swap back to rats. IMO if your snake is eating rats I would try to stick with them.