The U.S. Food and Drug Administration (FDA) is warning consumers not to feed their pets certain Nature's Deli Chicken Jerky Dog Treats because they may be contaminated with salmonella.

Kasel Associates, of Denver, Colo., which has recalled several other pet products this year, has refused to voluntarily recall the treats. It recalled one lot of the treats on Oct. 2 but did not extend the recall to lot code BESTBY061913DEN, which is covered by this warning.

Salmonella can sicken animals that eat these products, and humans are at risk for salmonella infection from handling contaminated pet products.

The FDA says the products, which were made in the United States, were sold at Costco stores in the Denver area. It also says the Issaquah-based company has said it will pull the treats from its shelves and notify customers who may have bought them.

The treats are sold in 3-pound packages labeled as Nature's Deli Chicken Jerky Dog Treats. The FDA says the treats are sold in flexible plastic containers, which are yellow, blue, green and red, with black and white print writing. The packaging also has a digital photo of a dog on the front panel and transparent sections to view the treats inside. Lot codeBESTBY061913DEN is on the reverse side of the packages in the transparent section immediately after the term "All American Dog."

The FDA says the advisory is not part of its ongoing investigation of reported illnesses in dogs that have eaten chicken jerky treats.

Pet treats produced and distributed by Kasel that have been recalled are:

-- Boots & Barkley Roasted American Pig Ears and Boots & Barkley American Variety Pack Dog Treats

-- Nature's Deli Chicken Jerky Dog Treats [limited to lot code BEST BY 091913 DEN]

-- Boots & Barkley American Beef Bully sticks

For more on the FDA's latest advisory, read here.