In the past, I tried to breed mice too for feeders. I kept the mice in the same room w/all my critters and I didn't have any luck at all getting them to reproduce and I've had luck before doing this (but not when I had snakes)

Someone suggested to me that the mice could smell the snakes and it was stressing them out to the point that they couldn't produce.

And Marla's right.. Get her off of live. For the snakes safety.

Food for thought.