Samson is like that, when i put him in the feed box (seperate box that i made) he goes right into HUNT mode. The box will smell like mice so i put heavy duty black duct tape down in the bottom so i can clean it easy, plus if the mice pee or poo it will not get the cardboard wet. I have switched to prekilled rats now and they do not smell anywhere near as bad as the mice!! and you dont have to clean up a mess either!