What primary metric defines success for the specialist Leghorn breed?
Answer
Egg volume output
The Leghorn chicken is explicitly identified not as a dual-purpose bird favored for meat, but rather as a specialist breed where egg volume is established as the primary metric of success. Their entire reputation in poultry keeping history is built upon their phenomenal capacity as high-output egg producers. While other traits are important, the volume of eggs laid annually is the key indicator used to gauge their performance.

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