I always thought it was the opposite? The rats are the ones that are nasty and the mice are not.
What are your guys suggestions feeding live.....should you pre kill it?
I feed live mice and and DO NOT leave them in the cage. We feed w tongs and watch until it is dead. I dont leave it in there wandering around. But I can say a mouse last week grabbed onto my snake, didnt hurt her but let me tell you I no longer feel bad for them.