I've had gastro and so have my kids for the last day -- I finally got out of bed tonight after spending the day sleeping. Unless it has been a really long time, I would let him sleep. My DS2 who is breastfed has had a mild case of what I have. He has slept long periods (between 6 - 7 hours) and then been awake and cluster fed for periods at a time (like every hour to two). I just go with what he wants to do unless he has been asleep a really long time.

If you are really concerned, there is that free health line you can ring and the nurse will be able to tell you what to do.

It's not fun having a sick bub. I hope he recovers quickly