JHVEPhoto Just over a year ago, I thought Zoetis Inc. (NYSE:ZTS), the undisputed leader in the animal health industry, was fairly valued even at premium valuation multiples given that the company enjoys durable competitive advantages stemming from its scale and brand recognition. Since then, Zoetis stock has gained just 2% while the S&P 500 has soared almost 30%. This underperformance, if continued for longer, may spook investors, but I believe long-term investors should double down on ZTS stock because ...