I guess my take on the tags is a bit different from a Canadian perspective. Since we only have about 10% of the population of the US, we are export dependent. The tags are part of a traceback system required by our importers and are part of a system that can be (and is) automated at the processor level, so tags are retired as cattle are harvested and can be tracked to the carcass. That said, the inventory outstanding is a mess.
We put tags in from day 1 of the program (before actually as we participated in retention trials). Originally age verification was not mandatory, so we age verified our calves, advertised it and took a premium from the marketplace as it opened up some market opportunities for the buyer. Then our provincial government legislated mandatory age verification. It meant the loss of our premium but no operational change for us. In the meantime we had moved on to be a pilot herd with BIXS. This meant the RFID tag got us back some (not all) of our carcass data without retaining ownership of our calves. We used this data to package and market our calves and commanded a very significant premium from the marketplace. Now we are working through MacDonald's verification, and market BI Prime Protection and Express verified calves with carcass data to back them up. These are all tied to our herd and the RFID tag. We are starting to tie this to DNA information as well on the bull and heifer side of our program.
I prefer that RFID be driven by the marketplace, but in the Canadian situation it is not, so our goal has been to be ahead of the curve and command every premium that we can think of creating.
The tags have been around for a long time. We were weighing progeny test program calves with RFID tags in the early 90's and it was fantastic to weigh 300 calves and get the information from the scale in a file that could instantly be loaded into a computer and sorted. No more typing or handwriting errors.
The RFID tags approved right now have a relatively short read range, but are optimal for collecting data on cattle through a chute or in a kill box. The HF tags have a much greater read range, but are hard to isolate for taking individual animal measurements. If cattle are head to tail in a chute and the read range is 20 feet, you could be taking the tag from any of 4 or 5 animals, or even the ones on the outside of the chute.
RFID and traceability does not change my liability or responsibility in my eyes, it just makes traceback quicker. My liability is covered by documentation and doing things properly in the first place.