Kilo came from very loving home where the former owner had an older pit (approx 1 yr+) when Kilo turned 12 month, neither were neutered and thing became heated. After several fights between the 2 the owner had to find a safe place for Kilo. We have 4 other big dogs male/female 50 lbs and above also inside dogs 20 lbs and under and have had no aggression.... unless you count his reflection in the glass door. He is very sweet and house broken, but needs firm hand and someone who understands his breed. He is free to the RIGHT forever home.