I don't actually have them yet: I am building the coop this week from online plans and picking up my brand new flock this weekend!
http://www.ana-white.com/woodworkin...n-coop-planter-clean-out-tray-and-nesting-box
I'm planning on turning the door (opposite to the nesting boxes) into an open mesh wall for summer, add some holes at the tip of the gable ends for permanent ventilation, and leave the floor opening open at all times (or maybe close it a bit in winter, using a piece of wood with still some holes in it)... Though this might not be enough ventilation for the winter months. In that case, I would need to use the little side windows as permanent vents (instead of closing them in winter), and then I would have to lower the perch as the original plan puts the perch just in front of those windows.
That's an awfully tiny coop. And much too closed up for Texas.
You may do better with a more secure version of my Camp Cockerel -- basically, building a run and putting a 3-sided shelter on the windward end.
Some useful links for you:
https://www.backyardchickens.com/articles/hot-climate-chicken-housing-and-care.77263/
https://www.backyardchickens.com/articles/repecka-illustrates-coop-ventilation.77659/
Open Air Coops
https://www.backyardchickens.com/articles/jens-hens-a-southern-texas-coop.75707/
https://www.backyardchickens.com/articles/my-positive-local-action-coop.72804/
https://www.backyardchickens.com/articles/california-living.68130/
I hope it all works out well on your tight timeline.
