My first chick was a day 24 hatcher. He was very strong even at hatch....he is now six months, but.................... I have noticead the bigger he's grown he does have effects from the delayed hatch, the biggest thing being his balance and coordination. He's never roosted, probably would fall off if he tried. He's active and beautiful and can chase my cat through the house...yes I said house, but I do see small things that I attribute to the delayed development. Feathering out is the other thing. He still has down feathers under the feathers at his back near the tail. I love him just the same.