While one brand has withdrawn the affected products, a second, Darwin's Natural Pet Products, has not, according to the FDA.

Certain lots of Answers dog food and Darwin's Natural Pet Products, which includes dog and cat food, have been recalled after the FDA tested samples of the brand's pet food, which tested positive for salmonella and listeria. So far, no illnesses related to the recall have been reported, according to the FDA's press release.

ANSWERS Pet Food is voluntarily recalling several of its products due to potential salmonella and listeria exposure, according to the FDA.