Update: Got two fuzzy mice and one fuzzy rat. Offered mouse first, went after it. Offered second mouse, took immediately. I then offered the fuzzy rat (which was on the small side, maybe 10g) and the snake did something peculiar. The fuzzy rat wasn't moving much and the snake kept sliding its head over it. Finally, instead of striking and wrapping it, the snake started to swallow it, still alive. The tail was still moving as he finished it.
I might stick with this for a few weeks (two mice plus a rat) and then see if I can transition to just rats and then see if I can transition to f/t rats.