We are new to chickens and have 32 chickens arriving the end of May. We are in the process of designing and building our new coop. We are going to be fencing in the area with a couple of old dog runs but want to raise the coop to give them a place to get shade during the summer. How high do you recommend? We have Opringtons, New England Reds and a few Partidge Cochins. Any advice is welcome and this is the best chicken site I have found. Thanks to all in advance.