They are very easy to breed just set up a group of 1.2, let them grow together and they will breed like crazy. They are no more of a threat than any other rodent to your Bp's. I don't mess with them, I don't hold them or touch them there are much more nervous than mice and rats. This makes them bite first and ask questions later.LOL
from what i understand and have seen a few times they actually are scared of the ball pythons, like they see the ball and know what time it is lol and i rarely have to put somthing in the mouth of the live feeds to stop biteing its like they know thats what they are for and dont mind....might be why they are so mean lol