Happy new year to you all. Please I need una help, my baby will be 6 month's by 9th of this month and we normally buy his milk Sma gold in carton, so I don't no whether to buy from zero to 6 month's again or to buy from 6 month's up. When should he stop using from zero to 6 month's. Since we are buying in carton advice me doctors and mummy's in the house.