Yeah, it will be a big lesson learned if your bp decides not to eat anything but chipmunks. Sometimes you have to ask yourself if the juice is worth the squeeze.
I had a friend that wanted to watch his gtp eat a bird. He did, because that's what they eat in the wild. But, it was a long time before he could get him to eat mice/rats again. He lost a lot of weight, and ended up coming down with a respiratory infection later. I wasn't sure he was going to make it. It's thriving now, and informed the guy it wasn't a smart idea.
I'm with everyone else, don't try it. Rats and mice don't have much of a difference as a chipmunk and a mouse/rat. It's a bigger imprint.