Zoo EthicsZoo Ethics examines the workings of modern zoos and considers the core ethical challenges faced by people who choose to hold and display animals in zoos, aquariums, or sanctuaries. Jenny Gray asserts the value of animal life and assesses the impacts of modern zoos, including the costs to animals in terms of welfare and the loss of liberty. Gray highlights contemporary events, including the killing of the gorilla Harambe at the Cincinnati Zoo in May