Contents : Environmental Enrichment: An Historical, Why Bother with Environmental Enrichment?, Does Environmental Enrichment Work, Proactive v. Reactive use of Environmental Enrichment, Designing an Enrichment Device, The Enrichment Programme, Enrichment for Different Categories of Animals, Food and Foraging Enrichment, Social Environmental Enrichment, Housing, Furniture, Toys and other Objects, Designing and Analysing Enrichment Studies, Information Sources about Environmental Enrichment