Cattle identification can't be ignored, veterinarians are being told this week at the Western Veterinary Conference in Nevada. Soon, packers won't buy cattle that don't have an electronic ear tag, feedlots won't buy cattle without the tags, and stockers won't buy calves without the tags, says Gary Wilson, New Concord, Ohio, co-chairman of the Cattle Industry Identification Working Group. "Eventually, no animals will be purchased unless they are identified. You have to know the source," Wilson said, speaking to a standing-room-only crowd of veterinarians from around the US this week. It goes all the way up and down the chain,...