The aim of these experiments was to determine if previous experience of chicks
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response to food calling influences subsequent propension of maternal
hens to utter food calls. Seventeen
broody hens were tested three times a day without their 3- or 4-day-old chicks. Hens were tested in two situations: chicks were returned either after each test or at the end of all the day
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s tests. As palatability influences food calling in maternal
hens, experiments were conducted first with a highly preferred food item and t
hen with the
hens
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usual feed. The chicks
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capacity to respond regularly to their mother influences the
hens capacity to emit food calls. In fact, although the
hens did not lose their maternal state, they uttered fewer food calls w
hen their chicks were removed all day. These results suggest that the chicks behaviour following food calling could be a social reinforcement for
broody hens.