Red.
When they get the injections from a rooster's comb, the rooster does have to be killed. They can get rid of a rooster's comb without killing it but it has to be on the first day that it is born.
It's called a rose comb usually a rooster breed from Spain.
Rooster have "combs" on top of their heads and "wattles" that hang under their beak.
A hen is officially an adult when she starts laying and has a full comb and wattle. A rooster is officially an adult when he starts crowing, fertilizing eggs, and has a full comb and wattle. Remember that a hen's comb and wattle should be smaller than a rooster's comb and wattle.
The comb of a young rooster (cockerel) should start to show by the end of the first month and will grow much faster than the comb of a pullet. Keep in mind not all chickens have combs, it depends on the breed of chicken you have.
If they have a comb
The cock comb, or crista galli, is an upward protrusion located on the top of a rooster's head. It is made of fleshy tissue and plays a role in communication and mating displays among chickens. The size and color of the comb can vary depending on the breed of the rooster.
it is on top of their heads
It is called a comb.
The prepositional phrase in the sentence is "with the zigzag comb," which provides additional information about the White Leghorn rooster.
A rooster's comb is mainly used for regulation of body heat.
"With the zigzag comb"