Let's put some facts and figures to this. Incidentally, they are called flocks in the academic literature, so that is the term I will use.
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https://www.researchgate.net/public...wl_Gallus_gallus_in_Dudwa_National_Park_India
besides friendships, which can exist between hens, between roos, and between hens and roos, this observation has temporal application to do with reproduction
https://doi.org/10.1038/s41598-019-41336-5
and located them away from each other, creating separate territories
my roos share one territory, without fighting over it or hens. Hens choose roos remember, not vice verse.
Exactly. A lot.
My tree roosting pullets sleep apart from one another about 20' up in the same evergreen bushy conifer and they have to pick their way to their roost spots. They've been doing this without predatory incident since early summer. My tree roosting cockerel roosts alone about 9' up on the highest branches that will hold his weight, in a much smaller evergreen spineless holly. All of them spend their days with the rest of the flock, and are fully integrated members. The flock members who roost in coops do not consistently roost in a specific coop or with specific other birds. Most of them go to roost on their own, look in to see who's already there, decide whether or not to join them and / or move on to the coop next door. Occasionally they will change their minds and exit after someone else has entered and a squabble ensued. It all settles down by sundown, usually. Occasionally a cockerel or roo will emerge in the morning with a minor wound; there are 10 of them in those 4 coops overnight.