Two Chinese businesses and a U.S. company were indicted Wednesday in the tainted pet food incidents that killed dozens of animals last year and raised worries about products made in China.

Xuzhou Anying Biologic Technology Development Co., Suzhou Textiles, Silk, Light Industrial Products, Arts and Crafts I/E Co., and Las Vegas-based Chemnutra Inc. were charged in two separate but related indictments. The U.S. attorney's office in Kansas City said the tainted food led to the death and serious illness of pets in the U.S. last year.

One of the indictments charges Xuzhou Anying Biologic, located in China's Jiangsu Province, and Suzhou Textiles, in Suzhou, China, with 13 counts of introduction of adulterated food into interstate commerce and 13 counts of introduction of misbranded food into interstate commerce.

ChemNutra and company owners Sally Quing Miller, 31, a Chinese national, and her husband, Stephen S. Miller, 55, were charged with 13 counts of introduction of adulterated food into interstate commerce, 13 counts of introduction of misbranded food into interstate commerce and one count of conspiracy to commit wire fraud.