Hi- We are just getting started in raising chickens. I have been reading through the forums and coop designs and run designs. My husbands friend has (he thinks) 16 chickens that will be soon coming to live with us. they got out of his pen and so they are roosting everywhere so he is wanting to give them new home. We are in process of building a coop and run. we currently have a 16x16 raised deck that is not being used that we were thinking of using as base then putting floor over the deckboards and building a coop with a storage section. I'm wondering how big should the coop be to hold the 16+ chickens plus and new ones i might want to get? We live in central illinois and are trying to figure windows ventilation ect so we don't have to build tear apart rebuild ect... Also on a run if we have the room its ok for it to be BIG? They will be able to free range when i am home but several days a week they will be in run. Thanks for any suggestions you all have!