I'm planning on getting the assorted heavy chicks from mcmurray, but i was wondering how to build a coop for heavy chickens. This is my first time owning chickens and I have no idea how much space I would need for the heavies compared to the regular ones. I've got family that knows all about chickens, but we've got coop plans for regular chickens. Is there really a difference? These are the chicks I'm getting -> http://www.mcmurrayhatchery.com/brown_egg_layers.html . Thanks!