In the fiercely competitive charity world, the Slade Farm Donkey Sanctuary that inspires awe and envy in equal degrees. The 500 four-legged inhabitants of the Devon farm receive more than £14m a year in donations from the public - more than Age Concern, Mencap or the Samaritans. In an age when charities are having to cut jobs and struggle with multimillion-pound deficits, the Donkey Sanctuary is deluged with cash and bequests every day.