Its so hot where I live, the taller coop is cooler than the smaller one. The taller coop keeps the heat on the tarp farther away and is more ventilated. I had to add more shade to the smaller one. Anyway, my older 4 month old chickens roam around my fence yard all day, they only go in at night. I can't let the younger hens out of the smaller coop until they ready to lay eggs. The Roosters try to rape them when I let them out with the main flock. However, sometimes I let them out in the am and bring them back in with scratch feed before I open the door to the other coop.