Coop for 7-9 chickens

For 7-9 birds I would go up to the medium coop section -- if I lived in the northern US. Keep in mind that it's not unusual for people to have only 2 or 3 chickens.

Also, in Texas, your birds will do much better in a 3 sided type of coop / run. Southern summer heat is almost more than chickens can tolerate. Every summer, some people lose chickens to the heat. So they need plenty of breeze, and shade is a necessity. As for winter, there really isn't one in the south, to a chicken -- even if you get some below freezing nights as we do.

Mine have an oversized 4 sided coop that has so much open area or hardware cloth for walls that it is in effect three sided. In the heat of summer, before the plants grew enough to give shade, they would gather in the coop during the heat of day for the shade. I haven't lost a bird to heat in several southern "chicken years" (knock on wood.)

Here is a thread showing the kinds of setups that work well in this climate.

https://www.backyardchickens.com/t/163417/please-show-me-your-hot-weather-coops/0_20

Good luck!