Dog Senior Cognitive Dysfunction: Recognition and Support

Canine cognitive dysfunction syndrome is the dog equivalent of dementia, causing disorientation, sleep disruption, and behavioural changes that significantly affect welfare.

Key Facts

CDS affects an estimated 14-35% of dogs over 8 years of age, with prevalence increasing with age
Signs include getting stuck in corners, staring blankly, waking at night, house soiling, and reduced interaction
The acronym DISHAA covers the main signs: Disorientation, Interactions changes, Sleep-wake cycle changes, House soiling, Activity changes, Anxiety
Selegiline (Anipryl) is licensed to treat CDS in dogs and can improve signs in some cases
Environmental enrichment, regular exercise, and mental stimulation may slow cognitive decline

Welfare Considerations

CDS causes significant welfare harm through disorientation, anxiety, and sleep disruption that affect both dogs and their owners. Affected dogs appear confused and distressed, particularly at night when they may pace, vocalise, and appear unable to settle. House soiling due to CDS is not a behavioural choice but a neurological failure, and punishing affected dogs compounds their distress. Supportive care including nightlights to reduce disorientation, maintenance of routine, and appropriate medical treatment improve welfare. The trajectory is progressive, and quality of life monitoring helps owners make timely end-of-life decisions.

What You Can Do

Learn to recognise early signs of CDS including subtle changes in interaction and sleep patterns
Consult a veterinarian about medical management options including selegiline
Provide nightlights, familiar routes, and predictable routines for dogs with CDS
Use a quality of life scale to monitor your dog and discuss end-of-life planning with your vet