Many zoos simply will no longer accept gifts of large cats from outsiders. Indeed, even bears can be subject to "humanitarian" sterilization or castration because they are overly pampered and are reproducing too quickly.
許多動物園根本不敢再收外人「饋贈」的貓科動物，甚至連熊也因過度飼養、繁殖，只好做「人道」結紮、閹割。