3. Merial - Top 10 animal health companies

2013 Revenue: $2.73 billion
HQ: Lyon, France

Sanofi ($SNY) has struggled a bit with Merial since its joint venture with Merck ($MRK) was interrupted by Merck's merger with Schering-Plough in 2011 and regulatory concerns prevented them from hooking back up afterward. Sales last year were down 5.3% as the company faced heavy competition to its flea and tick product Frontline. Sales of companion animal products, which make up 60% of its total, fell 9.8%. It did get approval in the U.S. last year for its new chewable flea and tick treatment in dogs, NexGard. Its much smaller production animal category was up 2.1% to €790 million ($1.1 billion). It was helped some by its late 2012 acquisition of India's Dosch Pharmaceuticals Private, picking up 86 drugs and a sales force of 279 people in one of the world's largest and fastest-growing animal health markets. It said it expected the unit to add about €350 million ($464 million) from that acquisition. -- Eric Palmer (email | Twitter)

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3. Merial - Top 10 animal health companies