Velcera (OTC: VLCR), a pet health company backed by Essex Woodlands, HealthCor Management and Two River Group, has agreed to be acquired by Perrigo (NASDAQ: PRGO) for $160 million in cash. Velcera is a specialty pharmaceutical and pet medicine company with a product line that includes a spray-administered drug delivery system. Velcera also offers a flea and tick treatment through its FidoPharm subsidiary, including the PetArmor franchise that exceeded $100 million in retail sales in 2012. The three investors backed the company with development capital in 2010.