Study: Owning a dog could help you live longer

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TORONTO (CNN) — Dogs could add years to your life, according to a new study from the University of Toronto.  

Researchers analyzed data from 4 million people in six countries.  

They found dog owners had a lowered risk of dying early by 24%. 

For those who already had a heart attack, the risk of dying was lowered by 31%. 

A major factor could be pet owners who walk their dogs got up to 30 minutes of exercise a day.  

Studies also show petting dogs can reduce blood pressure, anxiety and depression. 

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