Yesterday was the first time feeding my bp a f/t hopper mouse, and when Fluffy was constricting the crap out of it, all the hopper's guts came out of his anus. The mouse looked really slim, with guts hanging out of is a$$.

Is this normal? Did I thaw the mouse incorrectly? What can I do to avoid this in the future?

He then proceeded to swallow the mouse with guts hanging and all in a very weird way. Because he bit the mouse on its belly, he didn't try to find the head to start swallowing ... he just started swallowing by the belly. In other words, he bent the mouse in half, being the mouse's head and tail the last to go in.