It sounds like a seamless transition, I figured it would be, he is a good boy and the way you introduced him was ideal. My flock splits up like that as well. My flock is the same way, if you have birds rhat werent all raised together, that's usually what happens. I have even seen it with birds that were all hatch mates. Some of the hens prefer one roo over another, or prefer the company of certain other birds. Chickens have friends too! One of my Fav hens prefers to hang with the older birds, and all the others are always together by themselves. She even roosts with the others, when her hatch mates mostly huddle on the floor or use the low roost. I have noticed, too that when you raise chicks with the older birds like I do, that when the pullets come of age particularly when they start laying, they will leave the chick group and join the older hens and the roo.
anyasmifya, I think the purple you are seeing in your roo is just because of hormones
Frostbite turns the skin black, there tends to be swelling and bleeding as well, depending on the severity of it. As time goes by the black will shrivel into a scab and seperate from the living tissue, like a scab. Humidity in the coop is the key to frostbite too. Keeping the litter good and dry and having lots of ventilation is more important than insulation. I have had them get frostbite on the sides of their comb, directly in line above their nostrils, because of the vapor rising from their breathing, and none on the tips. Thats why putting petrolium jelly on the comb helps, it prevents the moisture from their skin and protects from frostbite the same way it protects a baby's skin from diaper rash.
