Insidious mistreatment of the kind that is alleged to have gone on at Twycross Zoo can be hard to detect by the lay visitor. We walk along paths through well maintained grounds to a welcoming reception. Everything appears clean and well kept. The seating is comfortable, the refreshments good and the general ambiance of the place is tasteful and nice. We see only well-fed creatures who appear to be adequately looked after. We go home happy, taken in by all the hype, and our trust in the benevolence of these commercial enterprises remains in tact.