Some will but with enough hides and or burrowing substrate they are usually fine. I have a young ball that refused to eat in a 6 qt tub and he was smaller than the snake pictured for sure. I put him in a 28 qt with a good inch of aspen and no hides and he has taken off on feeding and is doing great. Some people have had lots of problems with large tubs and small snakes but it has never been an issue for any of my animals