I just got 4 chicks, and am going to build a chicken coop in the next couple weeks. I'm not sure if I am going to get more, but I might. So I need to build a coop for like 4-8 hens. I was talking to people army local feed store who own chickens and they were tell me the coop itself does not have to be big because they will only be in there when they sleep and they sleep shoulder to shoulder. Is that right? They are going to have a big run and possibly the whole backyard depending on how my dog does with them. I'm just curious how big it needs to be for my babes to be healthy.