LONDON, ENGLAND - AUGUST 02: Molly the Staffordshire Bull terrier plays plays with a ball at Battersea Dogs & Cats Home as she awaits a possible new owner on August 2, 2010 in London, England. Battersea Dogs & Cats Home rehome or return to their owners around 5,000 animals a year, however many dogs have to be put down because they are unsuitable to rehome despite being physically healthy. Last year the animal shelter had to put 2815 dogs to sleep. 321 of those because they were banned breeds, 482 for medical reasons, 81 due to behavioral problems and 1931 because of their temperament and aggressive nature which pose a risk to the public. 43 per cent of the dogs that come in to the dog's home are Staffordshire Bull terriers. Known as "Staffies" these dogs and similar crossbreeds are increasingly popular within gang culture as a status symbol, however, once abandoned they are very difficult to rehome due to their aggressive temperament. (Photo by Dan Kitwood/Getty Images)
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Getty Images News Dan Kitwood