I have two dog kennel coops. Being here is SC it works good. But during the day they free range in both yards I have fenced in. Inside I also have separate nesting coops and kitty litter boxes for laying. The ducks and chickens really like the kitty littel boxes the best for laying. You would never think a duck would like that tight of a space. One of the ducks does like the big box coop over the small ones.
In the winter the outside and insides are tarped for air space insulation with about 6 inches or more of hay on the ground at any given time.
They are great in the summer since I leave the tarps on the top (some areas have tin roofing across them, to keep areas dry from rain and cool from sun. But I roll the sides up and remove the inner tarps. Makes for fresh air through the day, and only a small amount of hay on the ground. I will roll the sides down according to the weather and open part of the top to boot. If it is a heat wave I will hang a fan inside to keep the air moving. Heat and humidity can be rough if the air does not circulate.
But I also have the 1/4 inch square wire on the bottom 4 feet and chicken wire attached to the hurricane wire that it is built from everywhere else. At least with the chicken wire if a snake is taking your eggs, he may get in but he is not getting out until that egg is crushed and if he is big he is not getting in at all.
The nice thing about these is that I can move them if I need to. I drive 5 foot metal fence posts at each corner and hose clamp it to the corner pipes of the frame to keep it from ever blowing over in high winds. The are easy to pull up with a pole and heavy wire or rope that you run through the hole in the fence post. Use it like a t- handle and lift with the knees.
This winter has been pretty cold, as every one knows, and having 4,100 watt lights down the length of each roost (8 total) keeps the chickens pretty toasty even when it dropped into the teens.
I did bring in the bantams because they are so small and farther away from most of the lights and my really old girls and kept them in my big transport cage in the house at night. What's a little hay that gets on the floor and early morning crowing in the house?