In 2014, the US Food and Drug Administration recalled Barkworthies Dog Treats, Simply Nourish Dog Treats, Bravo Dog and Cat Food, Pedigree Dog Food, and Hill’s Science Diet Dog Food. In most cases, these products were recalled because they contained traces of salmonella.
If pet food contains traces of salmonella, the brand or store carrying the product issue a recall of the item. Salmonella not only affects animals eating the products but also poses a risk to the humans who have handled contaminated pet food, especially if they have not thoroughly washed their hands after coming into contact with the product. People who think they've been infected with salmonella should monitor themselves for the symptoms of poisoning, which include nausea, vomiting, diarrhea, abdominal cramping and fever. Salmonella can also result in more serious human ailments. Pets with infections caused by the bacteria may be lethargic and have a loss of appetite, fever and vomiting.
Other potential reasons for the FDA to recall a pet food include mold growth, foreign objects found in the packaging and insufficient levels of vitamins. However, recalls categorized under these options are far less likely to occur and are generally isolated to a single lot or location.