I've known several pits and all sweet. They were.trained with a firm hand. I would be cautious about them since many in TX are bred for aggressive behavior to be trained to fight. Since you know the dog's history and it's been approved by the local shelter I'd trust it but be cautious till you know it well. I've been bitten by a Springer spaniel and a golden retriever. So I think it's mostly the training (or lack of).