I would say so yes they can already have it on cereal etc its just to have it as a drink you are supposed to wait until 12months. I would advise introducing it gradually by mixing 2oz of cows milk to 7oz formula then increasing the amount over a week or so. If there's any sickness or diarrohea then go back onto formula and don't just decide to swap milk all in one go. This can make babies sick.