A definitive cause of illness has yet to be identified after the U.S. Food and Drug Administration completed testing of chicken jerky products after it received complaints of dog illnesses associated with consumption of the treats. FDA released an update July 18, 2012 detailing results of sample testing of chicken jerky products. Testing showed adverse findings from Waggin Train and Dingo chicken jerky products, as well as from beef jerky treats manufactured by Del Monte Pet Products. However, the FDA says it has been unable to determine a definitive cause of the illnesses, or link the illnesses to a particular company, from the samples collected. The FDA sent inspectors to Chinese plants that make the jerky treats, but have not released inspection results.