Plymouth Rocks were developed from a cross of Dominique males and either Black Java or Black Cochin females. The original Plymouth Rock had a barred plumage pattern and was considered the most popular breed in the United States in the early 20th Century, used for both meat and brown egg production. Other varieties, including the Buff Plymouth Rock, followed the barred variety. Buff Plymouth Rock chicks are buff or straw colored. They have single combs and clean, yellow legs and feet. All the adult plumage is golden-buff, with the male plumage being slightly brighter than the female.