Enrichment falls into several categories: food-based (puzzle feeders, snuffle mats, foraging toys), sensory (novel scents, sounds, textures), social (interaction with people or compatible animals), cognitive (training sessions, problem-solving games), and physical (climbing structures, digging boxes, swimming). Different species need different enrichment. Dogs benefit from scent work and chew toys. Cats need vertical space, scratching surfaces, and hunting simulations. Birds require foraging opportunities and destructible toys. Fish respond to rearranged decorations and varied feeding locations. Adequate enrichment reduces destructive behavior, excessive vocalization, over-grooming, and stereotypic behaviors. Rotating toys and activities prevents habituation.