Jack is 150 lbs of love and has a great temperament. He is very intelligent and trained very easily. He has a running list of commands for tricks and manners. he has been trained in off-leash walking to walk right next to us or in the general area. Jack's sole motivation in life is to make sure you are happy. He gets visibly stressed when he can tell that you are unhappy. He gets along well with all dogs and is never aggressive.