Louisville-based TNG Pharmaceuticals Inc., an animal pharmaceuticals firm, has garnered $4.6 million from a sale of Series A preferred stock in the company, according to a news release. The financing was completed on Dec. 31, 2013. The company’s horn fly product, FlyVax, is a patented vaccine designed to significantly reduce the damage to cattle caused by horn flies, the released said. That improves the health and well-being of cattle. The vaccine, first developed by researchers at Auburn University…