He's not a Cornish cross, so he's got a decent chance at living a good life. Thing is, he'll probably get very big, maybe too large for your hens. He'll also eat a crapton of feed, in exchange for.....what? I guess if you're using him to hatch meat bird chicks it may be worth it.
I've not...
First bird does look like maybe a Red broiler. the next two are pullets, but they both look like mixed breed birds to me. Makes me think something like Dixie Rainbows or something along those lines, what was the other name, Pioneers? Anyway, a specific hatchery's mixed breed slow meat bird.