No aggression just will not follow commands out side of the back yard, runs away and will not come back when off leash and drags u along when on leash as well as jumping on strangers witch is a big problem when he weighs 35kg I've tried everything in the books with him and he made sure to be the dominant one at home and outside I do not believe in yelling at or striking my animals I've dogs in the past and never had these training issues before