Heaven, I know you are not talking about cows' milk, so it's a bit irrelevant for you. However for others, while the guidelines now say that dairy is ok from 6 months (wrt allergies at least), this does not include cows' milk. Once a baby has had more processed forms of dairy and seems to be ok, small quantities of cows' milk could possibly be introduced before 12 months - but ideally it is better to wait until 12 months.