Wildlife experts are calling New York city's plan to control the deer population on Staten Island nuts. City officials plan to perform vasectomies on hundreds of bucks. Cornell University ecologist Paul Curtis said a study that involved sterilizing deer in Ithaca ended after just three bucks were sterilized. "It wasn't safe for the deer, and it wasn't safe for us," he said. In addition, experts say that nonsterilized bucks can easily enter Staten Island and impregnate plenty of does.