I've noticed here in my browsing around and getting to know folks that most of you seem to have a variety of breeds in your flocks. Is this because there are just so many beautiful chickens and you want some of many? Do any of you have just one breed? I started out thinking I was going to get Black Australorps and now am wondering if a mix of 3 or 4 breeds would be better. There are so many wonderful looking and sounding chickens out there. Thanks!