I'm sticking with tribe.Oooh... I think I finally have a good way of putting it!
If left to their own nature chickens will form tribal groups. This is what @Shadrach has achieved with his husbandry techniques. (I might be getting there with my free range group, but I think I need more separate and better nighttime shelters for them to form more exclusive tribes). This doesn’t necessarily remove the description of “flock” for a group of chickens. From the new oxford American dictionary:
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especially if you were to replace “kind” with species... but given the opportunity chickens will form into further divided tribes (based on the criteria already discussed, preferring similar breeds/temperaments etc.) on their own. That’s the differentiating point, given the opportunity... but being social animals, if not able to form that grouping with like individuals, they will still do-exist and function in a flock with whatever other chickens are available?
Also note how the original sense was in reference to people, just another kind of animal, when we get down to it?
