Chronic stress is common in multi-cat households and single-cat homes with insufficient environmental complexity. Strategic environmental modification can dramatically reduce stress and improve cat welfare.
Chronic stress in cats causes measurable harm to physical and psychological health. Cats experiencing chronic stress have elevated cortisol, suppressed immune function, increased susceptibility to feline idiopathic cystitis (FIC), and behavioral problems that often result in owner frustration and rehoming. The source of this stress is frequently inadequate environmental design - not enough resources, not enough space, not enough escape routes in multi-cat homes. These are problems that can be directly addressed through thoughtful environmental modification without medical intervention. The welfare case for investing in proper environmental design is strong: it directly prevents suffering in a population of animals whose stress is often invisible until they are seriously ill.