What would you give for your dog to live longer?
A U.S. biotech company has unveiled an anti-aging drug that could increase a dog\u2019s lifespan by a full year. The drug isn\u2019t on the market yet, but it\u2019s sparked some debate about what\u2019s in the best interests of the animal \u2014 and what people would give for a little extra time with the animals they love.