My LO (4-day old) gets very sleepy after he went through his jaundice treatment in the hospital. He sleeps at feeding times. Is he feeling weak, by the treatment...or just generally very sleepy, at that age?

Don't think it's the treatment. Basically babies with jaundice are excessively sleepy. When my baby had jaundice, to wake her up for the feeds I would remove all her clothes off and changed her nappy b4 every feed and tickle her feet. This seemed to disturb her enough to have a good feed =)