the BP is 36 inches long or so, thick around, about 1.5 years old. pretty sure its a girl. the tank is now a 60ish QT Really Useful Box Tub. UTH only, but the snake is eating live well, so i don't think the problem is environmental. Neither my dum or my BP have ever striked at a mouse when ive dangled it in front of them. I have to leave the mouse in there for the snake to decide what to do with it. So the mice which dont move to seem to interest them at all.