Geez, my DD is Ginormous then! She was 23 lbs 5 oz at 6 mos! The pedi said at 6 mos she needed to be at about 32 oz. (she had JUST started solids at 6 mos) I think at 9 mos it goes down to 24 oz.
I wouldn't stress it as long as he seems happy and healthy. If you're feeding him when he's hungry and stopping when he's full then you're doing a great job!
I wouldn't stress too much, there seem to be varying opinions about the minimum needed. ?At our 9 month appt my pedi said the minimum they should be getting is 16 ounces of breastmilk/formula/dairy products to get their calcium requirements. ?So if your DC is eating yogurt or cheese this would count towards those 16 oz. ?
Re: Minimum amount of formula