For some reason the birds brooded by a hen are always better birds in just about every way........don't know why, but it seems to come out that way. I know why they are disease resistant, but their body form just seems better too.
Walt
This last year I have come to realize the same thing. Nobody does it better than Momma!
With my personal birds, if they are new birds or a young pullet, I will only incubate the first half dozen eggs. As insurace that I will have spares or back ups if something happens to the broodfowl. After that I let them hatch and raise them on their own. Which, IMO, is one of the best aspects of the OG/AG breeds.