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Facial blushing and feather fluffing are indicators of emotions in domestic fowl (Gallus gallus domesticus). von Cécile Arnould, Scott A Love, Benoît Piégu, Gaëlle Lefort, Marie-Claire Blache, Céline Parias, Delphine Soulet, Frédéric Lévy, Raymond Nowak, Léa Lansade, Aline Bertin

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