What was recalled
The initial recall covered Diamond Naturals Lamb Meal & Rice. Within weeks the recall expanded to include all dry pet foods produced at Diamond’s Gaston, SC plant, then to certain products from the Meta, MO plant in May 2012. The 16 affected brands: Diamond, Diamond Naturals, Chicken Soup for the Pet Lover’s Soul, Kirkland Signature, Kirkland Signature Nature’s Domain, Taste of the Wild, Natural Balance, Wellness, Canidae, Apex, Country Value, Premium Edge, Professional, 4Health, and Solid Gold. The breadth reflects Diamond’s co-manufacturing model, in which the Gaston plant produced kibble for many brands sold under independent marketing labels. A consolidated recall summary is maintained at the Poisoned Pets timeline; the CDC’s formal outbreak report is at MMWR 61(23).
Why it was recalled
The contamination was traced to environmental Salmonella in the Gaston, SC plant. FDA inspectors documented multiple manufacturing-floor sanitation deficiencies, including failure to maintain hand-washing stations and inadequate equipment cleaning between production runs. Diamond voluntarily shut down the Gaston facility on April 8, 2012 for full sanitization. The Meta, MO plant came under scrutiny in May after a separate testing event and was added to the recall scope. Two dog illnesses and two cat deaths (in a Montreal shelter) were directly linked. The CDC’s parallel investigation found 49 human cases of Salmonella Infantis infection across 20 states and 2 Canadian provinces, including 10 hospitalizations — predominantly in infants exposed to contaminated kibble dust during feeding.
Health risks for your pet
Salmonella infection in dogs and cats can present as vomiting, diarrhea (sometimes bloody), fever, lethargy, and decreased appetite. Many infected pets are asymptomatic carriers — they shed Salmonella in their stool without showing illness, which is the mechanism by which household humans (especially infants) become infected. Severe canine cases progress to dehydration and septicemia. Healthy adult dogs typically clear Salmonella with supportive care; puppies, seniors, and immunocompromised pets are at higher risk. The zoonotic risk — transmission to humans, especially small children — is the more serious concern in dry-kibble Salmonella events.
What to do if you bought affected product
Affected lot codes are over a decade past expiration; no remaining product should be in active circulation. If anyone in your household experienced unexplained gastrointestinal illness in spring 2012 traceable to handling pet food, the historical exposure is documented — though most cases resolved without intervention. For ongoing pet food handling generally: wash hands after each feeding, store kibble in a sealed container, never use food bowls for human-food prep, and keep pet feeding stations away from infant care areas. These hygiene practices, originally CDC recommendations following the 2012 outbreak, remain best practice today.
How this affects KibbleIQ’s grade
Diamond Naturals today scores in the B range on KibbleIQ — see our current Diamond Naturals review. Per our methodology, the rubric scores brands based on the current ingredient list, not historical recall events. Diamond’s post-2012 quality-control overhaul (new sanitation protocols, Hazard Analysis & Critical Control Points review, expanded environmental testing) has held: no major recall has affected Diamond-manufactured brands in the 13+ years since. The 2012 incident is now studied in food-safety curricula as a case-study in co-manufacturing risk concentration. When methodology v2 ships recall-history scoring, single-incident brands with documented sustained corrective action (like Diamond) will weigh less heavily than pattern-of-recall manufacturers.