Dude, AST's can remove fingers and LIMBS! You really think its worth asking to even try that? I'm not trying to offend you, but I'm being blunt. I honestly don't think you should keep turtles if you want to try that. Use common sense, I know you have some. If you want something to house with your RES, try a map, painted, spotted, or musk. You'll enjoy that much more than an RES with 3 legs.