ok the mouse was pretty close to his girth.maybe ill try feeding in the tank not sure yet.i change his water everday so i dont think he will get tank aggression if keep going in to change his water.also i didnt really know how to get him out of his tank.im still a little nervous about taking him out and im sure he knows that but first i kinda pet him gently then i waited 15 seconds then i picked him up from the middle of his body with one hand.was that the right way to take him out?and he curled his neck back when i was putting him in and it made me jump a little any pointers on the fear situation lol