The hormone oxytocin is produced by all mammals and is linked to bonding.Dogs given extra doses of oxytocin - the same hormone linked to pair-bonding in humans - were better at performing simple tasks, indicating they were better at "reading" their owners, according to a study published in the journal Animal Cognition.


Dogs are better able to complete certain tasks than their ancestor, the grey wolf, even when the wolf is brought up in a domesticated setting, Oliva and other study authors said.Researchers theorised that since both humans and dogs usually produce more oxytocin as they interact, the presence of the hormone indicates that dogs evolved into being the perfect human companion because that chemical bond allowed them to better "read" human commands.The drug, which occurs naturally in the body, has been found to foster connection between humans, in addition to lowering blood pressure and other indications of physiological stress.

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