Christmas is coming which means warm atmosphere, presents, smiles and lots of tangerines. But have you ever faced that unpleasant feeling of depression which sometimes visits us right before the holiday? Perhaps you have at least once had such sad thoughts that made you feel like an outcast around all the happy people hustling here and there. So imagien our surprise when we foudn out that not only people but also their pets feel blue from time to time. Welcome 10 greatest pets who have all of a sudden given up on life.