I don't know if this is urgent or not, but I am a first-time turtle owner and I am worried. I have two turtles that both have dents in their shells!
About the turtles:
The turtles are from the same clutch, one has grown much larger than the other (one is about 3-4 in., other is 2.5-3 in.). Both have same food (pellets fed by hand), romaine lettuce, occ. sweet potato or carrot, occ. cuttle bone, light (basking and UVA/UVB), basking area, filters, 20 gal. tank. Their tank water is usu. around 75 degrees.
Pics of the turtles and their set up can be seen at: http://www.flickr.com/photos/kklemesrud
Pics don't show the dents well. If someone responds I'll post pics of the dents.
About the dents:
The smaller turtle has had some mishaping of his shell, which I've posted about before. They are both acting normal, vigorous, and generally happy. They eat well. However, now the turtles both have indentations on their shells. The pleural scutes of the carapace on both turtles are indented in places, but not soft. (Although, I'm not exactly sure what a "soft" shell would feel like, so I don't know if I am gauging it properly.)The dents WERE NOT incurred by any injury, such as falling.
Is this an issue of them not being able to shed scutes? Is this an issue of them not having enough of something? Too much of something? What can I do to fix is or reverse the problem? If it is because they can't shed scutes, what should I do?
ANY HELP WOULD BE WONDERFUL. Thank you!

