Do animals go mad in zoos? Do performing dolphins die of boredom? Can domestic pets go insane? These are some of the questions asked about the way we treat animals in captivity -in zoos, in safari parks or in our own homes. We've come a long way from medieval menageries with lions crowded into stinking pits, but even in the zoos of 1978 animals are kept in what appear to be cramped conditions. One answer seems to be our latest innovation in the field of captivity - safari parks. These give the animals more freedom, but do they give enough? Are captive bears who pace constant figures of eight going mad? On film, we visit zoos and safari parks to see what evidence there is of animal madness. And in the studio. Jack Pizzey talks to animal men of all persuasions - a safari park operator, a conservationist, a pets psychiatrist and an RSPCA vet - and asks the question: is keeping animals a crime, a necessity or just a harmless and sometimes lucrative pastime?