A chip in her shoulder.

• Position: Pets - Missing pet, Willow, found - Brief article

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She's from Boulder, Colorado, but after disappearing five years ago, a calico cat named Willow recently turned up across the country in New York. How she traveled 1,800 miles is still a mystery, but how she made it home is clear: When Willow was a kitten, a microchip with her owners' contact information was implanted in her; animal rescue workers in New York accessed that information with a quick scan of the cat. Vets inject the microchips--tiny transponders the size of a grain of rice--under the skin with a syringe, usually between the shoulder blades; the chips...