It’s a dog’s life, so the saying goes. Thanks to one dogged photographer we are finally privy to the reality of this proverbial canine existence. London-based Martin Usborne has drawn inspiration from the secret world of dogs for his latest project, entitled Mute: the silence of dogs in cars, a series of photographs of forlorn and forgotten four-legged friends. It comes as a darker follow-up to his more overtly amusing collection Life as a dog in the recession, and was yesterday described by the Independent as ‘capturing dejectedness, anger and sadness.’ Not quite as dark, though, as the controversial piece of dog related art executed by Costa Rican artist Guillermo Vargas, who, as part of an exhibition in 2007, tied an emaciated stray dog to the wall of the Códice Gallery, Nicaragua, and reportedly left it to starve. (Due to incandescent outrage within the blogging community, the truth was later revealed that the stray dog was both fed and spared death – Vargas, however, refused to officially comment on what exactly became of the hound). Vargas’s contribution provokes some obvious ethical questions (including, Vargas would argue, one aimed at the hypocrisy of viewers/bloggers, their dismay towards a single stray in a gallery not matching up to their attitude towards the countless strays that continue to starve outside it). Usborne’s work, on the other hand, may elicit some subtler philosophical questions, relating to such diverse philosophical areas as aesthetics, ethics, and the philosophy of mind.