Companion Animals

Companion Cat Stress-Related Immune Suppression

Chronic stress in cats suppresses immune function, increasing susceptibility to infections that cause significant suffering in stressed animals.

Key Facts

Stress hormones including cortisol directly suppress immune cell function
Cats in crowded multi-cat households show elevated stress cortisol
Herpesvirus flare-ups in cats are frequently triggered by stress
Environmental enrichment measurably reduces stress hormone levels in cats

Welfare Considerations

Chronically stressed cats experience a cycle where immune suppression leads to infections that cause further stress, compounding the original welfare problem. Upper respiratory infections, herpesvirus recurrences, and urinary disease are all linked to chronic stress in cats. The solution is primarily environmental - providing adequate space, resources, and predictability rather than medical management of the downstream consequences.

What You Can Do

Provide multiple separate resources in multi-cat households
Reduce known stress triggers in your home environment
Consider Feliway pheromone diffusers to reduce stress
Monitor stressed cats closely for early signs of illness