'Blue' is looked after at Battersea Dogs & Cats Home whilst awaiting a new home on December 29, 2010 in London, England. Blue is one of a few dogs to have spent their second Christmas in Battersea. Battersea Dogs & Cats Home was founded 150 years ago and has rescued, reunited and rehomed over three million dogs and cats. The average stay for a dog is just 28 days although some stay much longer. Around 550 dogs and 200 cats are provided refuge by Battersea at any given time. By Oli Scarff/Getty Images.