We got 15 Australorps a few weeks ago, and I've noticed that most of the time they choose to hang out together underneath the coop (where it's shady) which is about 64 sq ft. They have an attached run that adds another 150-200 sq ft but they are usually under the coop. It hasn't really warmed up here yet, the warmest was about 68 degrees one day, but most days are 60 or less and have a nice breeze.
They aren't necessarily huddled together, some are, but others are just hanging out, scratching, etc.
Do you think they are under the coop because they are hot? I'm just wanting to plan ahead more for summer if they are already hot in this weather? It gets pretty hot and humid here, and I'm planning on covering the run with a tarp for shade, but maybe that won't be enough?