Pet Care Needed

Our boy, Jack, came to us when he was 6 years old. He has some basic manner issues, and a pretty major issue with other animals outside our home. He is fine with the dogs we have, but loses his mind whenever we are out in public. He is a 50lb. AmStaff so he's strong as hell. We are looking for someone to desensitize him so that we can take him to training sessions and around other animals.