The dimensions I am setting up will turn out to be 90 square feet
Just the coop or total? The coop alone needs to be at least 80. The square footage in the run doesn’t count towards that number. The total space including run should be 280 square feet minimum.

my kids now have a 8 x 24 ft coop.. I've got 17 chickens and getting more.. just went to check on them, they've got plenty of room.
