Generally speaking a positive expereience especially when he puts his hand on DS2 while he is feeding at same time, but othertimes when I have told him to wait he has pulled nipple out of DS2 mouth and put it in his!!!

He has never deliberatly tryed to hurts DS2 he chucks things around and has had things hit him but not on purpose he is just a boistrous boy. (there is 18 months and 4 days difference)

Hope that helps a bit feel free to ask anything.