Urgent Care :: Help... turtle shell inverted???

[dcakes]

So I have a really nice turtle haven setup in my front yard that currently contains two baby yellow belly sliders. A friend of mine works at PAWS and someone surrendered a baby red ear slider... so she thought to bring it to me. Only problem is, he his shell is inverted. Like the bottom of the top part of his shell is flipped up. I have no clue what this means. I'll take a picture in the morning but I'm just wondering if anyone here knows anything about this. I tried looking it up but didn't get any solid answers other than maybe a possible vitiamn d deficiency. The people who had him kept him in the crappy container they got at the mall and he didn't have any kind of sun lamp or outside time. Now he has a sweet little home with friends but I wanna make sure he's healthy

[steve]

It's probably related to a poor diet (too much/little protein) and lack of calcium/uvb. Minor instances in younger RES can be corrected over time.