I have 3 BR, now 18 months old. Got them at 3 days old at a local feed/pet store. They have had typical black white barring, and physical characteristics I have seen in photos. They are in a very, very soft molt - only a mother hen would notice. But I noticed this week that all 3 have a new color showing in their feathers…Still black and white but now a golden brown looking stripe. Only noticeable up close. When they were younger in some lights you could see a bluish iridescent look to some of their stripes. Does this mean they are mixed, or is this a normal thing the BR do? Just curious, they are very friendly, wonderful pets and I will love them anyway. Not planning on breeding…..ever!