Merck Manual

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Red earlobes portending pigmented eggs, chicken
red_earlobes_portends_pigmented_eggs_chicken_2_crop_high
Red earlobes portending pigmented eggs, chicken

    Red earlobes portend pigmented eggs in a chicken.

    For an examination, check the color of the earlobes to predict the color of the eggs the hens will produce. Hens that have white earlobes generally produce white eggs, and hens that have red earlobes generally produce brown or other pigmented eggs.

Courtesy of Dr. Patricia Wakenell.