Ah. Thanks for the explanation. So you're saying this method is out of date because the average Plymouth Barred Rock is not bred to SOP? I have noticed quite a few pictures lately of Barred Rocks with pale legs so it had me questioning if they were even the correct breed.To be able to sex by the head spot when breeding barred to barred parents it has to be consistently bred for that trait and most hatcheries do not anymore. Every barred rock pullet I have had over the past few years had a large head spot with a good bit of white on their neck as chicks until they fully feathered out. You can’t tell by the chick down with hatchery stock it’s simply not consistent. Now from a quality breeder that is a different story.