In one quite large chicken house with a flock of 12-15 birds, can three roosters get along or ???
I agree with the others, if raised together with enough space and females, they will probably work it out. I once kept two Brahma roos in a 5 x 8 house with a 10 x 15 foot run with 3 hens for a year. They all got along well enough, even with only 3 hens.
And (although it will not be the end of the world) am I correct in assuming next years chicks will be all over the board as to color?
I think that's a safe assumption.
What quality (health, vigor, size, egg laying, etc) can I expect out of McMurry. Certainly not looking for show birds, but healthy stock that will carry the appropriate type and function.
I've never purchased hatchery Brahmas but many hatchery stock of other breeds. Hatcheries aren't known for having really good type or color, they're not exhibition stock. Birds also tend to be under weight/size. They do tend to grow faster and lay better, which is probably what many backyard hobbyist appreciate.