A practical, non-invasive method for early identification:
• Female chicks: Primary feathers grow faster than covert feathers
• Male chicks: Primary and covert feathers grow at similar lengths
• Works best on certain fast-feathering breeds
• Observe feather curve—females show a two-step shape, males a single curve
• Ideal during the first few days after hatching
• Useful for small-scale backyard flocks and breeders alike
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