It's splitsville for New York's favorite gay penguins — and one of the lover-birds has taken up with a fetching female. Now, the Central Park Zoo is dealing with a gay-straight love triangle Jerry Springer couldn't dream up. And nobody knows who will lay claim to the pair's adopted chick. The drama started when Silo left Roy, his mate of six years, for Scrappy, a female transplant from SeaWorld who'd never had chicks. "Silo and Roy stopped spending as much time together or building a nest," said John Rowden, the zoo's curator of animals. At first, Silo started hanging out...