Indoor cats may live in under-enriched environments that can contribute to physiological stress and behaviour disorders. This can lead to aggression, urine marking, house soiling behaviours, over-grooming and displacement activities. Proper enrichment makes their environment more physically, socially and temporally complex by increasing novelty and opportunity to express species appropriate behaviours. Enrichment includes visual, auditory, olfactory, gustatory, tactile and structural stimuli.
Five Pillars of a Healthy Feline Environment: