Luckily, I haven't had any problems with live feeding (in my massive month and a half of BP ownership! LOL)...

One time a mouse rushed Milton (he had already eaten one, so he wasn't quite ready for the second one, I guess!). I think the mouse was more just exploring, but it scared him and he wouldn't eat it. He just acted like he wanted out of there! It wasn't really an attack, but he's still a baby!