New Kind of Cattle Branding: An ID Number.

This article presents information about a plan to track cows, bisons, and other livestock by tagging each animal with a bar code in the ear or radio-frequency chip imbedded under the skin. The tracking devices would make it possible to track each animal and would make it easier for animal health officials to track an outbreak of disease such as mad cow disease. The U.S. lags behind Canada and Europe in tracking livestock.