Nanosensors To Track Livestock

Livestock tracking has been a problem for farmers. The USDA envisions the rise of "smartherds"—cows, sheep, and pigs fitted with sensors and locators relaying data about their health and geographical location to a central computer.

Implanting tracking devices in animals has been initiated for pets, valuable farm animals, or for animal wildlife conservation. Injectable microchips are already used in a variety of ways with the aim of improving animal welfare and safety to

• study animal behavior in the wild,

• track meat products back to their source, and

• reunite strays with their human owners.

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