My sister and I have a box of 2 day old chicks coming in the mail on Monday, and we'd like to be able to tell which ones are which, as we are splitting one order, and they are all different breeds. The Crevecour shouldn't be too hard to identify. I'm not really shure what the other chicks look like though. I hope I was of help. Nova, I, too have been wanting to look for such a web site.
Most sites show only the adults.
I've been borrowing a Privett Hatchery book from my local feed store that shows both adults and chicks. I have been taking pictures periodically so that when they finally get old enough to positively identify I can back-track through photographs and make my own chick identification booklet. Not much help to you now, I'm afraid. Minorcas have the normal single comb. Crevecoers have the same mostly black down, but they have a small to large puff ball on their heads.