Actually, Polish started with a genetic mutation that created a vaulted skull.All characteristics in special ornamental chickens originate from normal wild chickens. Take the polish with their funny and fluffy wigs. There must have been some chickens that had a more fluffy head to start with.
The problem with “crowless” roosters is you need genetic material to start with, as you can’t pull it out of nothing.
This is very interesting. I did not know this about the ear. I think I remember something about them not being able to hear their own crow, but I didn’t know how it worked. Thanks for the fact, I learned something today.I know that rooster can crow loud bc they have a shell inside the ear that closes when they start to Crow. If you have a couple of rooster that make less noise it is possible that this has to do with a poor closing of the ear shell or with the way the vocal cord (or whatever) is build. This can be a caused by a defect in a gene.
I also wonder this. How would it affect fertility? I suppose you’d have to breed it to find out.How ethical and practical it is is a different discussion.