I am buildings my first coop and I am wondering.... I wanted to make a very basic 8x10 structure, on a slab of concrete with the front wall completely open/(fixed with hardware cloth) and the top 2 feet (out of 6 ft high) around the other walls open with hardware cloth as well. I live in Southern California and we have almost no rain and temps are very mild. My question is, do I still need to fix something on the open areas for winter or do you think they will be ok? Also, all of the coops I see have a raised part. Is this a must have? They will have a high roost and raised nesting boxes. Is there any other reason to raise a part of the coop? I am a total newbie sorry for all the questions and I hope this makes sense.