The Canada goose population in Seattle parks is down by about 75 percent from three years ago, when federal agents started rounding up and killing thousands of the birds to control their numbers. Federal wildlife agents have destroyed more than 5,600 geese in Seattle since a federal judge ruled in 2000 that the government could kill Canada geese in portable gas chambers set up on the back of trucks. The more aggressive approach has worked to the point where people can "see and enjoy" the geese, but "not be slipping in poop everywhere," said Roger Woodruff, a U.S. Department of...