Well so far its been working out. I have all the sides covered except for the front so hopefully that helps the little one feel more secure. He/she ate for me on monday without a problem. I didn't have to really do anything to make the chondro eat. I just put the mouse in front of him/she and it took it pretty quickly, so the tub size doesn't effect the neo in anyway from what i see. The water bowl does look big in the picture but its not, it doesn't really hold much water in it and i can't ever imagine the chondro drowning unless he/she wanted to