Companion Animals

Companion Cat Stress and Immune Function

Chronic stress in cats directly impairs immune function, increasing susceptibility to infections and exacerbating existing health conditions.

Key Facts

Cortisol from chronic stress suppresses lymphocyte function and antibody production
Feline herpesvirus latency is broken by stress, causing recurrent respiratory signs
Idiopathic cystitis, hyperthyroidism, and IBD are all associated with chronic stress
Stress-related immune compromise increases susceptibility to upper respiratory infections
Environmental enrichment and social management reduce cortisol levels in cats

Welfare Considerations

Stress-immune connections mean that welfare problems cause secondary health problems beyond their direct impact. A chronically stressed multi-cat household cat may develop herpesvirus flares, cystitis, and increased infection susceptibility as direct physiological consequences of its welfare deficit. This cascade underlines that welfare is not separate from health but foundational to it - addressing stress prevents a range of health conditions.

What You Can Do

Identify and reduce chronic stressors in your cat's environment proactively
Provide adequate resources per cat in multi-cat households to reduce competition stress
Consult a feline behaviourist for cats with stress-related health problems