"Many nonprofit pet shelters rely on donated foods to feed the animals and remain financially stable, but due to the wide use of wheat gluten and other contaminated ingredients in many wet pet foods and the large portion of foods represented in the recall, many pet shelters have had to discard foods despite the financial burden of doing so.Unable to locate the source of the kidney failure exhibited by test subjects that consumed some of their wet food products, Menu Foods sent food samples to Cornell University between 13 March and 15 March for chemical analysis.