Indoor cats without adequate enrichment are at high risk of boredom, frustration, and stress-related health problems that reduce their quality of life.
Indoor cats deprived of environmental complexity experience chronic understimulation that manifests as lethargy, overeating, and redirected predatory behaviour toward owners. Stress-induced conditions like feline idiopathic cystitis cause significant pain and distress. Many indoor cat welfare problems are preventable through relatively inexpensive environmental improvements that satisfy natural behavioural drives.