DS2 is 3, almost 4. He doesn't have a dx yet but it's looking like it will be ASD like DS1. He's developmentally delayed and has limited understanding and vocabulary, though this is improving.
I also have a 6 month old DS3, and DS2 will not leave him alone. I don't know if he thinks he's playing with him, but he never stops poking or prodding him. He's not at all gentle and often will poke his eyes or pull him roughly unless I'm constantly vigilant. He also tries to put toys or objects into his mouth or tries to lay on top of him. He'll also wake him up during nap time.
It's got to the stage where I can't go to the loo during the day without taking one of them with me. Household tasks are impossible; I have to watch them constantly as he could easily do DS3 serious harm.
I just can't get through to him about being gentle, or make him realise he might hurt DS3. I've tried punishments and praise, shown him how to be gentle a million times, but it just doesn't get through.
Anyone have any tips that have worked for them? I'm at my wits' end in a filthy house!