Years ago, two administrations ago, Walt Jeffries of Sugar Mountain Farm was active in a fight against an animal identification scheme. The opposition echoed some of the standard American memes: anti-big government, pro-local, anti-technology,anti-big boys, pro . They were successful in killing the birth to dead ID plans, called NAIS.
The other day I saw a picture of a cow in a tweer. The cow had tags in both ears, plus an RFID device hung around her neck. I expressed some surprise; the owner explained the reasons, including "traceability", which led me to google the term. That led to this article in Beef Magazine, which brought me up to date.
Apparently the stopgap compromise solution was to identify for those animals crossing state lines the start point and the destination point. But now they're looking again at a more sophisticated plan.
Walt Jeffries is no longer actively blogging so I don't know what his take on this is.