The U.S. Food and Drug Administration (FDA) says 3-ounce bags of Lamb Crunchy’s dog treats, sold in Washington and three other states, have been recalled because they may be contaminated with salmonella.

The affected treats, distributed at Gelson’s Market, General Pet, Nor-Sky Pet Supply and Independent Pet in Washington, California, Wisconsin and Colorado, have UPC numbers 727348200038 and date codes 122015. They were manufactured by Pet Center, of Los Angeles, Calif.

Salmonella was detected by the State of Colorado, Department of Agriculture in a random sample, and no illnesses have been reported to date, the FDA says.

Salmonella can affect animals eating the products, and there is a risk to humans from handling contaminated pet products, especially if they have not thoroughly washed their hands after having contact with the product or any surface exposed to the product, according to the FDA.

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Pets with salmonella infections may be lethargic and have diarrhea or bloody diarrhea, fever, and vomiting, the FDA says. Some pets will have only decreased appetite, fever and abdominal pain. Infected but otherwise healthy pets can be carriers and infect other animals or humans.