I have one black Cochin rooster and 49 hens. I have seen him mate with 3 of the hens and I suspect a 4th because she's losing feathers on her back. I'd like to eventually incubate and hatch my own eggs but how will I know he is mating with what chicken? Do I just have to separate the hen I want bred with and him from the rest of the flock? Can I assume he's mating with the whole flock? I'd like a different rooster, a breed known for better laying to mate with the hens but I can settle with the Cochin for now.