Juju is 3 1/2 months old, weighs 146 grams, and is 3.5". He is perfectly smooth, as I have been following Tom's advice on feeding and housing. The very back scute, however, has what looks like an indention at the top, and appears to have a bump at the bottom. He has not been injured. He eats and poops like a small horse, and is growing nicely other than this. Is this something I should be concerned about? It is hard to tell from the picture, but hopefully you can see what I am referring to in his shell.