I feel a little uncomfortable about children drinking the milk of other species. That said my 3 year old still likes cow's and goat's milk. He self-weaned at 2.4 yrs and has continued to have 'cravings' for cow's or goat's milk. Obviously he must still need it. I have a feeling though that drinking milk is not that healthy in adults (think there's some kind of evidence/anthropological reasoning for this) and would love to do some reading on this. Can't find it on kellymom. Can anyone help?