My eight month old got a cold two days ago and today he has been sleeping for about three hours... should I wake him? He rouses when I touch him, but he seems to be sleeping soundly.
The cold has probably been tiring him out a bit so he will be catching up by taking extra long naps.
It's good as you do, to check on him frequently though. Then if his nap goes up to 4 hours in a row, yes I would gently wake him. From there, stick to your usual schedule - also if it means for example a shorter play or bath time.
Let me know if it persists even if his cold has passed.