well they put a collor on him and they treated him like a dog they make him eat and drink out of a dog bowal, make him go to the bathroom outside,and make him sleep outside when he was bad. he was always angry but one kid knew how to clam him and those two where friends. but then the kid got adopted the other kids bullied him calling him dog,monster, and freak. he never smiled. then the bakugou came and the orphan caretakers thoght that the bakugou's would adopt someone else but the bakugou's seen JJ's suffering and adopted him.
so anytime he sees a collor or someone else with a collor it makes him reamber and he gets very angery and his eyes turn deeper shad of yellow.