Here's young White Rock that Ken posted early on in this thread. That is nice, wide, thick, big, freak, call it what you will, but that's a head. Nice to have a photo from this "plane" to see a nice skull. They're either born with this or they're not. I see many of our birds that also have that nice skull and a few that do not. We can't neglect this feature when we're selecting your breeders.
When do you first look for it? One of my mentors says, "You find it in the brooder".
Yup, those White birds were bred for years by Robert Blosl. They're in good hands at the Weaver estate now.
I saw a great comment on Rock heads on another forum posted by Danny Feathers, he said that if you can look down from above and see the eyes it's too narrow..