I raised 2 Dark Cornish/Indian Game birds (not those horrible white Cornish Rock Xs) with my McMurray order, and I absolutely ADORE THEM. They are very docile, sweet, gentle birds. Extremely tame but then they all are because I have handled them a LOT. The one however had bad legs from the beginning. She gets around fine, but she definitely does not have a normal gait. She has a huge breast in proportion to the rest of her body and is runty. She has difficulty roosting and likes to stay off by herself so the others don't knock her down. But she comes RUNNING to me when she sees me and practically jumps in my arms. She is such a doll. I will be devastated if anything happens to her. I am trying very hard to get my husband to allow the Cornish birds to be house chickens. I doubt that will happen though. LOL!
If I had it all to do over again, I would have gotten more of this breed. They are beautiful birds and their brown feathers have a rich green glossy tint. They are very quiet and almost never talk except little cheeps.
Don't know about eggs because mine are just approaching 4 months, but I have read that you might get 2 eggs a week for a couple of years.
They have no trouble being in the mixed flock. They get along and keep up perfectly fine, even Vader with the bad legs and deformed chest. Only roosting gives her some trouble. No they don't fly high and bounce off the ceiling like the Hamburgs and Ancona does but they just mosey along pecking on the ground, nice and calm and peaceful with the Brahmas, Wyandottes and EEs.
I call these my fatties. And the Hamburgs and Ancona are the speedies. LOL