I have 10 silkies that are 1 week old, almost 2 weeks. I was wondering how big the coop should be along with the run? I have a horse pasture that I am going to use for my coop and run but I know I have to make sure that predators can't get them. We have a nasty hawk and some stray cats hanging around. I'm new to this and have no clue how big the coop needs to be. Any and all help or suggestions welcome.