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.
Only 4% of survey respondents report having consumed raw (unpasteurized) milk in the past year.
Though effective for other pathogens, the aging process didn't inactivate H5N1 avian flu virus in most raw cheese samples.
Milk losses, mortality, and herd removal led to an estimated $737,500 loss to the farm over the observation period.
The cats were part of a group that lived on a poultry farm hit by the virus a few weeks earlier.
