Hi, I'm just wondering how other families deal with siblings fighting. DS 11 and DS 9 are constantly bickering with each other over every little thing and it regularly becomes physical, usually just a quick punch or shove as DH or I shut it down quickly. Punishment for physical fighting includes being sent to their room or screentime bans. This kind of thing is annoying but I kind of know how to handle it. What I can't figure out how to deal with is DS 11's complete intolerance of DS 9. A lot of the time he can't bear to be in the same room as him. Everything annoys him from his sniffling, to the way he shuffles his feet, his humming or singing to himself, the sound of him eating! He goes into a rage, shouts at him to stop and stomps out of the room banging doors. Sometimes I know DS9 deliberately goads him, but a lot of time he's just being himself. It really upsets DS9 that everything about him annoys DS11. I'm at a loss as to how to deal with it. I've tried talking to DS11 about how he's making his brother feel but he doesn't alter his behavior. I've tried punishing him, but he just thinks it's so unfair as he feels he genuinely can't help it. I did consider it was a sensory issue, but it literally only manifests in relation to DS9. I don't want to tell DS9 that he has to alter his reasonable behavior in his own house, but sometimes I just tell him to give it a break for some peace. Sorry for the essay. Any suggestions? Thanks.