We have a 10x12 coop shed, with the inside penned for them of 8x8. We will be expanding the 8x8 soon, when we install the 3 tiered laying boxes (15 nests), to 10x 10 or so. Leaving just enough room to gather eggs from the back of the nests and the feed cans. I think I have 3-4 roosters that may end up in the crockpot, which will be a hard thing to do. I named them, ooooops! But that still leaves about 25 in that space. I like the tetherball ideaHow much space (feet by feet) will they have? There are lots of ways to entertain your flock....some you buy, some you can diy....hanging a head of cabbage (think chicken tether ball that is edible), tossing in a flake of hay, bag of leaves you stored away, etc for them to scratch in, putting in and then rearranging some roosts, stumps, a pallet on blocks, etc. Honestly I think folks are surprised at the conditions chickens will choose to go out in that first year, their idea of intolerable is different than ours.