I know imprinting on a particular prey type can and does happen but I don’t think that’s a good reason to not offer a varied diet. Lots of snakes, including BPs, in the wild and in captivity, eat more than one type of prey. It definitely won’t hurt to try especially since the OP already has the feeders. All of my snakes eat 2-3 different types of prey and I want to expand their options. I have one carpet that prefers mice but he will eat rats occasionally.