In 2017, Evanger's recalled a batch of its Hunk of Beef food because it was exposed to the drug.
Smucker's officials, which doesn't produce Evanger's, told WJLA that it was investigating the results of the station's investigation on its food and are working with suppliers.
Smucker’s officials said this week that the low amounts of the drug found in the station’s investigation is not a threat to pets.
WJLA reported that their test showed non-lethal levels but any amount of the drug is not permitted according to federal law.
"However, the presence of this substance at any level is not acceptable to us and not up to our quality of standards," Smucker's officials told the AP.
The company said it doesn't use meat from animals that were euthanized in its pet food products, the AP reported.
For more on the company's decision to return the products, click here for Gravy Train information and here for Kibble 'N Bits.