Pessimistic Dogs See the Bowl Half Empty

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• Dogs may be optimists or pessimists, new research suggests.
• Pessimistic dogs appear to be more prone to engage in unwanted behaviors, such as barking and destruction.
• Both behavioral and drug therapies are available to help affected dogs.

Now, a new study reported in the October 12th issue of Current Biology, a Cell Press publication, suggests that this kind of separation anxiety occurs most often in dogs that also show "pessimistic"-like behavior."