So Xander is two weeks and my pediatrician said we should start giving him Vitamin D supplements. I tried to give him some after I finished breastfeeding him (he was trying to sleep at the time) and he just spit it up.

I'm wondering how and when other people give supplements? Should I do it when he's hungry instead and do it before breastfeeding? Or maybe after he's finished one side, try to give it to him before going to the other side? What do you do?