I was thinking about this and the way the neighbors gave the pup to you, and was wondering if maybe you ought to have them sign something that officially relinquishes their ownership rights to him. I'd hate to have them see what a good dog he becomes and then decide they'll just take him back. I wouldn't want to deal with them to even have them sign something, but it was a thought that popped in to my mind as something they would do since they seem like pretty rotten people.