Recently, Carlita's health deteriorated quickly and her quality of life was poor with no possibility of improving.Carlita, the 21-year-old white Bengal tiger who had been at Zoo Miami for almost two decades, was euthanized on Monday, the zoo said. In May 2012, Carlita was retired to a special enclosure in a secluded quarantine area because she was starting to show signs of her age, the zoo said. Recently, her health deteriorated quickly and her quality of life was poor with no possibility of improving. Carlita was born in captivity in July 1992 and came to the zoo two years later....