So, update on the two males. Stumpy is doing the best, but he went much longer in his life with decent care from the original owner, before the brother took them on and nearly killed them, so he was in the "best" shape to begin with. He's got a nice round belly now and his double-chin look is coming back in around his beard. Buddy, the smaller male, is starting to fill out around his tail base and in his stomach, I can't see the bones at the base of his tail anymore. He's also in shed! Probably his first shed in a long time!
As for Missy, she is still eating really well, but I can see a lot of bones. She's active and getting some of her pale coloration back which is good, because she darkened right up after she laid her eggs.