I can only assume you mean the comb of your chicken is turning black and that would either be a trauma injury or the result of frostbite. Either way this is not great news but you can use a petroleum jelly like Vaseline on the comb to keep it moisturized. Comb and wattle injuries are not uncommon and unless the bird gets blood poisoning they can survive the loss.
No, a chicken's head is located at the front of its body, not the back of its neck. The head is usually covered by feathers and connected to the neck, which allows the chicken to move and turn its head easily.
A Black Star rooster has a white dot on its head, where the females do not. Black Stars as sex-link chickens meaning you can tell their sex by their color once hatched.
yes
Chickens duck and bob their head as a substitute for eye movement. Chickens eyes do not move well and head movement increases the area of vision and ground covered when searching for food. When you see the head moving about then you know the hen is looking for something.
Chickens
Their Pecker is on their head.
They may be head lice. If you head is also itchy you should purchase some head lice treatment and treat yourself (and all members of your family).
I think acne doesn't have treatment unless you want to use strong chemicals on your skin
To get to the other side.
In the back of his/her head of course! haha
to get to the other side
It's brain and internal parts.