Cat Senior Cognitive Dysfunction Syndrome: Recognising Dementia in Older Cats

Feline cognitive dysfunction syndrome (CDS) is an Alzheimer's-like condition in older cats causing disorientation, behavioural changes, and significant welfare impacts.

Key Facts

CDS affects an estimated 28% of cats aged 11-14 and over 50% of cats over 15 years.
Signs include disorientation, altered sleep-wake cycles, inappropriate vocalisation, house-soiling, and reduced interaction.
The acronym DISHA (Disorientation, Interaction changes, Sleep-wake alterations, House-soiling, Activity changes) describes key signs.
CDS is the feline equivalent of canine cognitive dysfunction and Alzheimer's disease in humans.
Currently incurable but manageable with environmental modification, nutrition, and pharmaceutical support.

Welfare Considerations

CDS significantly reduces quality of life in affected cats through disorientation, confusion, and anxiety. Nighttime vocalisation reflects disorientation and distress. Owners frequently mistake CDS signs for normal ageing, leading to underdiagnosis and undertreatment. Welfare management includes environmental enrichment (puzzle feeders, sensory stimulation), predictable routines to reduce disorientation anxiety, night lights to reduce fear during nocturnal confusion, and dietary supplements including omega-3 fatty acids and antioxidants. Selegiline (Anipryl) has evidence in dogs and may benefit some cats. Regular quality-of-life assessment is essential as CDS progresses — timely euthanasia prevents prolonged confusion and distress in advanced cases.

What You Can Do

Use the DISHA framework to assess your senior cat's cognitive health at each vet visit.
Maintain consistent feeding and sleeping routines to reduce disorientation.
Provide night lights in sleeping areas to reduce nocturnal confusion and distress.
Discuss evidence-based supplements and pharmaceutical options with your vet.
Join the International Cat Care's senior cat health community for owner support resources.