Zoo Zoo (Wildlife Conservation Society) leading the discussion. From then on, zoo professionals became increasingly aware of the need to engage themselves in conservation programs, and the American Zoo Association soon said that conservation was its highest priority. In order to stress conservation issues, many large zoos stopped the practice of having animals perform tricks for visitors. The Detroit Zoo, for example, stopped its elephant show in 1969, and its chimpanzee show in 1983, acknowledging that the trainers had probably abused the animals to get them to perform. Whipsnade Park in Bedfordshire, England, was opened in 1931 as the first safari
World War Zoo gardens set up Pig Clubs, feeding and fattening livestock on food scraps including the London police pig club, run in the empty cages of ZSL Regent's Park London Zoo, the usual occupants having been evacuated to Whipsnade. Zoo staff at London Zoo planted a 10 pole plot allotment with tomato seeds sent from America and also hosted a National Wartime Utility farm and garden exhibition was set up at ZSL London Zoo, entitled the "Off The Ration" Exhibition to encourage visitors to grow their own crops and livestock. The Imperial War Museum exhibition in London in 2010 called Ministry of Food