I second that with the babies varying by hatch, I have noticed the exact same thing...sure there are several factors that play in to that, like environmental conditions during the 21 days in the egg and of course which rooster mated with which hen, but its just like with people, not all their offspring are going to look alike. And speaking of chick therapy, its relaxing to lay down on the floor with chicks and let them peck all around you, something about that I think is just great to do, especially after a long day!