Answers Pet Food and Darwin’s Natural Pet Products, were found to have produced pet food that was contaminated with the bacteria salmonella and listeria, which can cause illness in pets that can then infect their owners.

The U.S. Food and Drug Administration issued a recall on several pet food brands sold by Darwin’s Natural Selections and Answers Pet Food after testing found evidence of listeria and salmonella contamination. Although most pets don’t become ill from this contamination, the germs can potentially spread to humans from pet stool and saliva.

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