How does the dressed weight of a five-month Barred Rock rooster compare to a six-week Cornish Cross (CX) fryer?
Answer
The Barred Rock yielded a smaller dressed carcass (about 3 pounds) despite being much older.
There is a profound difference in growth rates and final size between the specialized Cornish Cross and the dual-purpose Plymouth Rock. A typical CX bird raised as a 'fryer' achieves a dressed weight of 4 to 5 pounds by only six to nine weeks of age due to rapid development. Conversely, a Barred Rock rooster, even one that has been free-ranging, needs about five months (approximately 20 weeks) to yield a dressed carcass weighing around 3 pounds. This substantial difference highlights that Plymouth Rocks do not bulk up at the same rapid rate as modern commercial broilers.

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