Posted: Sat Dec 22, 2012 3:04 am Re: Spots on their shell
Ok, green spots - not to worry, he's probably growing out of his "greenhood" - they get less green on their shells, naturally with a pelleted diet.
Crack in a shell - a bit more of a concern, like the others have said: need a photo or a really accurate description to know for sure.
Advice: One thing I was fortunate enough to learn early on in my RES care, is that you really need to spend a good solid 30 minutes watching your chosen turtle. That way you can know exactly how healthy it'll be, how good it'll eat, how hard it'll fight, how much it basks/sleeps, if it's sick, if it has a strong hunger response. Good signs with all those things tell you that you've very likely picked a healthy, thriving turtle.
Don't get me wrong, I think every turtle deserves a home. But, there is a line there too... if you're going to spend your money on something, you want your money's worth. I know that those two philosophies totally contradict each other - but I'm sure there are other people here who would agree. You can't adopt every single turtle in the world, but you want to give every one of them a fighting chance. It's our biggest dilemma.