Where do they determine this? Are Dorkings more common in other countries then the USA?
where do they determine what? the Standard of Perfection? that was established when the breed was accepted by the APA. for silver greys, that was back in the 1800s I think? reds it was around 1975. they used the existing size standard but added the color variety. my years may be off, but when the breed is entered in the standard, the birds exhibited at that time have to meet it to qualify.