I've read that frost or moisture on the windows of the coop is not good, I've noticed some frost what looks like snowflakes on the outside of the window (west side of coop). It's not solid frost, but the little snowflake looking things are all over the window. Is that a concern? Also, the bedding I use is straw and wood chips, is that okay during the winter? Does it need to be a certain depth? I thought I read something aboutt 4"?? And then finally (thank you if you got this far, I really appreciate it ), with the snow and frozen ground there isn't anywhere for them to take dirt baths, is this still necessary in the winter? Do you provide something for them to be able to do that? THANK YOU!!!!