My husbund is thinking about building a new coop and run. He wants to put it under the trees branches. Should I be concerened about the birds and lice from the birds getting on the chickens. The run will have a completly screened top over it .So no birds can get in. But they will be allowed to get on the screen. Another question is that my husbund will insulate the inside of the coop. He wants to put metal on the walls covering the insulation. We will have heat lamps inside the coop.. I'm not worried about the cold winters. But more concerened about the hot summers. It can get in the high 90's in the summer and metal walls in the coop. The coop will have windows and I run a very small red bulb in the summer to hopefully stop the chickens from pecking each other. The floor will be cement.