Chronic psychological stress in cats causes measurable physiological harm, suppressing immunity and triggering idiopathic cystitis, upper respiratory disease, and behavioral disorders.
The link between psychological stress and physical illness in cats is well-established and clinically significant. Cats suffering chronic stress experience real medical consequences - painful bladder inflammation, respiratory disease, and immune compromise - that arise purely from psychological distress rather than infectious agents. This highlights that mental wellbeing is not separate from physical health. Creating stable, predictable environments with appropriate resources, positive human interaction, and opportunities for natural behavior substantially protects cat health.