I really never considered whether or not meat birds have the same space requirements as hens. The meat birds I know about - Cornish X, certainly SEEM like they use less space - they usually camp out by the feeders and don't move around in the space they have all that much. A lot of folks raise meat birds for various reasons...one of them is that they dislike the conditions in which commercially raised birds are reared....by that I mean in cages. So, there is no really great precise to answer your question. The other major meat bird is the Freedom Ranger - I assume it needs all the room a hen would require (about 8-10 sq. ft./bird in the run, about 4 sq. ft./bird in the coop). The same would be true of the heritage breeds some raise for meat. Again, with Cornish X it appears they use less space. Theoretically, you could really pack more in than you would other breeds...but then you are left with where you stand on the dilemma of chickens raised in cramped conditions. Plus, it is fair to warn you, what goes in must come out...and a lot comes out of a Cornish. Too many birds in a small space and they become very soiled with all that output. So, is it all clear as mud now?