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Friendship is in the meadow
Cows form friendships that are essential for their health. This is the result of a British study conducted in 2011 by the University of Exeter (United Kingdom) on several cows. For three years, the researchers analyzed the heart rate and cortisol levels (the hormone that reacts to stress) of these mammals. They concluded that the cows were significantly less confident and more stressed when they were separated from their friends. Their heart rate slows when they are together.
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