Babies sleep a bunch, so it's pretty normal. They'll have their bursts of zipping around, then out like a light for a while. I think they have to rest up for all the growing they do.
If he's eating hay, that's probably fine for the critical care. Did you start him on alfalfa pellets yet? A little bit of soft poop might be expected with his new diet. If it gets worse or is still going on after a week, you may need to cut back some on the critical care and see if you can get him eating more hay.
Yep, they grow really fast until about 12 weeks, then it slows down a bit.
If he's eating hay, that's probably fine for the critical care. Did you start him on alfalfa pellets yet? A little bit of soft poop might be expected with his new diet. If it gets worse or is still going on after a week, you may need to cut back some on the critical care and see if you can get him eating more hay.
Yep, they grow really fast until about 12 weeks, then it slows down a bit.