it has to be colourful to attract females.
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.
Oh, dude, you're talking about a short person and a rooster's appendage? Well, technically, a rooster's appendage is called a comb, and a short person could refer to someone vertically challenged. So, if you put them together, you might get a short person admiring a rooster's stylish comb... or something like that.
If they have a comb
The prepositional phrase in the sentence is "with the zigzag comb," which provides additional information about the White Leghorn rooster.
it is on top of their heads
Red.
It is called a comb.
A rooster's comb is mainly used for regulation of body heat.
The thing on a rooster's head is called a comb.
"With the zigzag comb"
A Leghorn rooster is a large white bird with a red comb.