Like was said I think the vaulted skull preference depends on the breeders tastes. I personally like a small vault. I have seen some silkie chicks who look down right deformed with insane skull vaults! Like someone else said I would rather not see chicks with that extreme either. They are more fragile due to the vault. Mine hatch with slight to no vaulting. I'll show you a pic or two when I get to my computer.
~Steph
~Steph