I currently have 3 BOs, 2 Jersey Giants, and 1 Copper Maran, and I'm thinking of maybe getting some fertilized eggs for when one of them goes broody. 2 of my BOs and my JGs will turn one in April, and I'm guessing one of them might go broody in the spring. However, I'm struggling to find a good breed for my flock. I want some good layers like my BOs (they lay about 5-6 a week, each), but less noisy. Lots of people say BOs are quiet, but mine aren't . So I know it really depends on the chicken, not so much the breed, but it would be nice to get some with a quiet reputation. It is also important for them to be docile, and cold hardy as well (be able to survive up to about -5 degrees celsius). Suggestions?