Maybe add an oz and see how he gets on! If he doesn’t drink the extra oz, stay on 6oz I’d say x
My boy has just turnt 11 weeks. He was on 6oz & draining every bottle apart from 1 so we upped him to 7 today & so far he’s drank around 6.5oz (polished off 2 full 7oz bottles this afternoon) so he definitely needed that bit extra.
I’d rather it be there for when he feels like he needs it than not. X