Not sure of his age as he was bought at an auction. I know, I know that's beside the point right now. We have a temporary run for our 5 Silkies as I am building the coop for our chickens. They were out yesterday in the run in the sun and 1 gray Silkies tends to lay on his anyway but I noticed that he was breathing heavy. DW came out and checked him and he was very warm. She put all of them back in their respective cages and they are fine. Was he just a little overheated or dhould I be looking for something else? Had plenty of water available but no shade. My fault, I am going to put a tarp on it for shade today. Hopfully coop and run will be done in the next 32 weeks and I won't have to worry about a temp. run anymore.