Minnesota Public Radio slideshow:
Tracking livestock to prevent disease
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When this calf is sold at auction, the USDA wants to track whether it moves on to another farm or is slaughtered. By tracking all of these lifetime animal movements, the USDA hopes it will be able to quickly contain livestock disease outbreaks. (MPR Photo/Lorna Benson)

When this calf is sold at auction, the USDA wants to track whether it moves on to another farm or is slaughtered. By tracking all of these lifetime animal movements, the USDA hopes it will be able to quickly contain livestock disease outbreaks.

(MPR Photo/Lorna Benson)
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