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Human crying stresses out dogs more than pigs

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In a study published in Animal Behaviour (), researchers at ELTE Department of Ethology, Hungary found out that both companion dogs and pigs differentiated between human vocalizations of varying emotional valence, but only dogs matched their emotional state with the heard emotion. This suggests that dogs’ special selection during domestication for vocal cooperation with us may have facilitated the emergence of such emotional contagion from human sounds.

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