Thank you, Jack was a stray someone thru him out the door in front of cumberland farms in the middle of winter at about 6 months old.  He was hanging around a complex and we finally took him in.  Sometimes he likes it when he is picked up and other times he just attacks so much that he draws blood.  We love him to death.  I thought maybe that was just a way he was playing but I think maybe he was abused.