K.N.
At my son's 9 month check-up our pediatrician told us he should be getting at least 15 ounces of formula per day. More does not hurt, but less might. As far as solids, he said that kids at this age self-regulate. So, if one day they only want one Gerber container and another day they want 3, that's fine. He said we should be feeding him solids 3 times a day (our daycare suggests a snack in the afternoon too). That being said my son eats a ton of oatmeal with formula for breakfast, about 6 ounces of veggies for lunch and 3-5 ounces of meats/veggies/yogurt for dinner. He goes through three 6 ounce bottles of formula during the day and about 18 ounces at night. So, he's well over the needed 15 ounces of formula which is fine. I think the key thing is how your kid is on the growth charts. If she is healthy then whatever she wants is fine.