I have a dcb who will be 3 in one month. He is a tall, solid boy who looks a year older than he really is. He is also an only child. When he started with my at 15 months, he was a pusher, hitter and a biter. Naturally the kids were not fond of him. His parents were so proud of their big boy who could rule the roost with strong armed ways. Over time I got him to choose words over braun and he has become alot better but the kids still can't get over their first impression of him. He is tolerated by them and they do not seek him out as a playmate unless I encourage it through a group activity. The kids also used him as a scape goat for blame and were super sensitive should dcb touch them in a gentle way. I spoke to the kids many times about accepting dcb and see how he doesn't do what he used to but the stigma is still there. Encouraging note: Some of these dck's have gone on to JK and the replacement little ones love him and he is very protective of them. I understand it is tough seeing your son not accepted, but keep showing him the kind way to be in this world and he will be fine. Good luck