Cats in multiple states got sick after eating the food, which was undergoing testing in the wake of a recall.
None of the samples were positive for H5N1 antibodies, but some showed earlier infection from human seasonal flu strains and swine flu strains.
The detection came less than a month after the state began its bulk milk sampling program.
The ratings aren't intended as a detailed threat assessment and don't indicate which pathogen is most likely to trigger the next pandemic, but instead are a guide for research investment.
Cambodia's human cases, many involving people who had contact with sick poultry, have been on rise since 2023.
Mastitis was the ewe's only symptom, and tests on milk were positive for H5N1 avian flu virus.
In other updates, the CDC said serology testing ruled out human-to-human spread in a California child's illness earlier this year.
One of the two assessment programs targets wildlife incursions, and both are part of a larger effort to battle avian flu on poultry farms.
Amid economic and food supply concerns, officials continue to track animal detections, and scientists assess pathogenicity and treatment.
The North American lineage H7N9 virus was last detected in US poultry in 2017.
