Coop #3 has most of what I found helpful after a few years.... freezing water is annoying but manageable. I have big pavers, 16x16 all around the coop and run and the coop is a few inches off the ground with a solid floor. The run has a dirt floor. Nothing has gotten in: dug in/under, roof is solid and 1/2 inch hardware cloth on entire run sandwiched between wood so it can’t be pulled off. My previous run had a skirt of hardware cloth buried around perimeter but for my current one I decided to use pavers. Poop board at a comfortable level makes cleaning easy. Solar light in case I have to go in after dark. Bears are not around here so I think I have it covered 
