When my DS when that old I would make a 3 oz bottle, he would eat it, I would change him, and then I would try to put the bottle back in his mouth. If he sucked it I would make another oz and if he turned his head I knew he was done. Now I am doing that for his 4 oz feedings going up to 5oz.
My DS is almost 5 1/2 weeks and usually eats 3 oz every 2-3 hours, but sometimes goes longer at night. Once or twice a day he'll eat 4 or 5 oz. He eats about 25-28 oz a day.
Re: ? for FF moms
anywhere from 2-4 oz. depending on if he falls asleep at the bottle, from 1.5-3 hrs apart.
it just depends