Re: Been mia--but I am back =)
I think you can do whatever you want. My son is almost 20 months and doesn't drink any milk other than breastmilk. He drinks water when we are apart. My son has iron deficiency anemia which can be aggravated by cow's milk, so I am not in a hurry to get him on it. If you want to introduce cow's milk, however, there shouldn't be any harm in doing so as long as your baby doesn't have any health issues that would preclude it.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).