Lucas Altman remembers it well: On an early October night in 2014, he had taken his two Labradors to New York’s Central Park when suddenly they became alert, their tails wagging with the thrill of the hunt as they towed him to a patch of shrubbery. “It was dark, I was getting impatient and I didn’t bother to look,” he said. A day later, he returned to find out that another resident had made a shocking discovery under the bushes: a dead bear cub, oddly placed under an old bike.