For the next couple of days here in Iowa ,the heat index could be as high as 106. I currently have three silkie hens.Little concerned about the heat. Would it be better to leave them outside ( as they have the ability to free range) or bring them in the house with the central air? Is it more of a shock to them expose them to the temperature change or leave them outside and put a fan in the coop? This is what the coop/run look like.They do like to find my ferns and go under them when it gets warm, but we haven't had the high temps like we are going to experience.