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''Be nice to your pets because they’ll be judging you on their own sense of morality.
Dogs and monkeys prefer to spend time with people who do good things and help people, said university researchers.
The comparative psychologist tested dogs and monkeys to see if they have a set of ‘morals’.
In the study, dogs watched their owners struggling to open a container while an actor either helped, acted passively, or refused to lend them a hand
The actors would then offer the dog a treat with the study finding the pets were more likely to choose the one who did nothing than those who had refused.
Anderson told the New Scientist: ‘If somebody is behaving antisocially, they probably end up with some sort of emotional reaction to it.
Dog’s long relationship with humans might have made them more sensitive to our feelings.
Similarly, monkeys understood fairness and helpfulness. They would shun actors who refused to help other people with basic tasks when they offered treats.''