ya mine wasn't drinking formula byt 12 months either. she started walking at 10 or 10.5 months old so once she started doing that she wouldn't hardly drink formula so at 10 and 11 months old she was taking 2 oz. between 2 and 4 hours maybe 4 oz, but usually 2
My 11 month old dd is offered 21 ounces of formula per day, but she will actually drink 17-18 ounces. She'll be weaned to cow's milk when I'm down to my last can of formula (I won't run out till near her 1st b-day).