Cats infected by the dairy virus

https://www.scientificamerican.com/article/bird-flu-is-infecting-pet-cats-heres-what-you-need-to-know/
Household pet cats not on dairy farms have been infected by the dairy virus in multiple states, but 2 cases in Colorado were indoor cats.  The possibility is that they may have been infected by humans.  It could be an indication that human infections are more widespread than they currently have identified.  Colorado has the most human cases detected so far, and the Colorado virus is most closely related in sequence to the one isolated from an infected Michigan dairy worker.  My guess is that humans took the dairy virus to Colorado because they were not reported to have gotten cattle from a known infected state, and the virus is most closely related to the one that infected a Michigan dairy worker.  No one is contact tracing, but an infected dairy worker or close contact of a dairy worker from Michigan is likely responsible for the Colorado infections.  How else did the Michigan strain get to Colorado and infect dairy herds there?
Ron Okimoto