We currently have 4 buff orpington hens but will be getting 10 new ladies when we move to our new place in a few months. We're considering a mix of amerecaunas and black australorp baby chicks. Thoughts? We live in Alabama. **we WILL keep the new chickens separate from our current 4** We're trying to plan the size of the chicken area which will be completely fenced in, including the top, to protect them from predators. So it won't be completely free roaming but we want to make it as big as possible. Is 500 sq ft per bird enough room? That would be 2000 sq ft for our current 4, including a small coop area. And 5000 sq ft for the new 10, including coop.