This undated photo released on Wednesday Feb. 6, 2013 by the Blue Cross shows a Jack Russell terrier being scanned for a microchip at the Blue Cross Lewknor Rehoming Centre in London. British authorities say that all dogs in England will have to be fitted with microchips from 2016. Britain's Environment Department says the chips will help reunite owners with lost or stolen pets, promote animal welfare and take pressure off shelters. (AP Photo/Martin Phelps, Blue Cross)
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