Honestly...we watched "That's my baby" on animal planet...a show that shows animals having babies, and then nursing. I said "look, that baby is drinking his mama's milk, that's how babies eat and get big and strong. Our new baby is going to drink mama's milk also (and then went on about how I fed him mama's milk and look how big and healthy he is now etc....)
I figure let mother nature teach the lesson...
HTH