I started my first flock last year with 4 buff orpingtons, and 4 ameraucanas. Over the course of the year, I lost one of each. I am looking to add 2 more birds, but wanted to try a different breed. Looking at what is available locally, I have narrowed it down to either black sex links or barred rocks. I am leaning to them for their high egg production, calm temperament, and the cold/heat tolerences. I was looking at Rhode Island Reds and Australorps, but from what I read they aren't as tolerant to heat. (we have hot summers). Just looking for something easy going that will eventually get along with my other girls as well as provide some eggs for my family. Any advice. My existing flock free ranges on 5 acres and are only locked in their coop at night.