Aratana Therapeutics Spiked 25%: Here's What You Need To Know By: Benzinga via Benzinga January 26, 2016 at 08:35 AM EST Shares of Aratana Therapeutics Inc (NASDAQ: PETX), a pet therapeutics company that commercializes bio-pharmaceutical products for ... Read More >> Related Stocks: Aratana Theraptcs Petmed Express Inc