Red Rock chicken

The Columbia Encyclopedia, 6th ed. | 2011 | 422 words | Copyright

Red Rock chicken the only chicken still popular to any large extent in the United States today for both meat and eggs. It resulted from a cross between a Rhode Island Red male and a Plymouth Rock female. The breed recently acquired new value when it was discovered that the sex of the day-old chicks could be determined by the differences in the color of their down. The variety is raised primarily in New England.

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