Should I wake a sleeping baby to feed?

It depends on how old your baby is. If he's a newborn, yes, especially if he has jaundice and he would need to stay hydrated. Personally for me, I didn't wake my son up for feeds. He wakes me up! He used to wake up every 2 to 3 hours and only when he was 3 months onwards did he start sleeping longer. I feel that he knows he will wake up and cry if he's hungry, so I have his hot flask and milk powder by the side of my bed so I dream feed him most of the times.