Genetic sequencing confirmed that the virus recovered from the raw pet food, sold nationally and in BC, and the infected cat were exact matches.
Also, 2 groups report impacts on both domestic and wild cats, as federal officials confirm a flurry of new outbreaks in poultry.
The CDC has now confirmed 64 cases from 9 states since the start of the year.
The three cats with suspected infections don't have any known exposure to raw milk, and investigators are examining other potential sources, including raw meat.
California's dairy farm outbreaks have spread beyond the Central Valley to the southern part of the state.
The infection also marks the first US case with exposure to backyard poultry, which fits H5N1's global pattern.
Also, the USDA reported more confirmations in cows, poultry, and other mammals and Labcorp announced the launch of its H5 molecular test.
Also, the USDA today confirmed Louisiana's first outbreak in a poultry flock, marking the appearance of the virus in all 50 states.
The Louisiana patient, who was exposed to sick and dead birds with suspected infection, has been hospitalized.
In other developments, federal and state officials report more detections in dairy cows, poultry, and wild birds.
