Some dogs seem to get indigestion pretty easily from rawhide, so if you do give it, start in very small amounts. Also, you need to supervise pups with rawhide, since they can be pretty dumb about swallowing large pieces they tear off (some pups never do this and simply gnaw). So if you do give him one at this point, do it in supervised situations and only give it to him for a few minutes at a time.
One of my dogs' breeders asked that we never give him rawhide because she had heard too many reports of serious intestinal obstructions caused by them, so he doesn't get them at all. There's a pretty large group of people who feel the way she does.
Also, be aware of the source of your rawhide. There have been reports (not sure if they're true) of dangerous chemicals being used to process rawhide that comes from overseas. I haven't verified these claims myself, but it's fairly easy to pick up USA rawhide, so why not?
Personally, I wouldn't give one to a crated pup of any age. There's too much chance of tearing off a big piece and choking on it or having it turn into a bowel obstruction.