Hi well hens do better in cold weather than in hot. I am in northern nevada where summers can get in the 100s and winters get snow sometimes and the coldest is 16. Sand works great. I have it in the coop under their roost and in their big enclosure. Its like a giant cat box. Put diatomaceous earth food grade in with it and in the nest boxes and fleas, flies and any parasites will steer clear. You can put a little in their food to which will keep internal parasites from making your chickens their home. Also keeps any smell almost nonexistent.