I will be having "city chickens". I'm going to [try to] build a coop similar to this: https://www.backyardchickens.com/web/viewblog.php?id=66725-wichita-cabin-coop Is this a decent mix to get? Is there anything bad or non-beginner for any of these breeds that isn't on the standard "about this breed" sheets? 2 easter eggers 1 speckled sussex 1 silver cuckoo marans Also, should I order an extra chick in case one dies? Thanks so much!