Cognitive dysfunction syndrome (CDS) in aging dogs — analogous to Alzheimer's disease — causes progressive neurological decline that significantly impairs welfare and requires proactive management to maintain quality of life.
Cognitive dysfunction syndrome represents a significant and growing welfare challenge as dogs live longer due to improved veterinary care. The subjective experience of progressive dementia likely involves confusion, anxiety, and distress — dogs that vocalise at night, appear lost in familiar rooms, or fail to recognise family members are experiencing genuine neurological deterioration that impairs their ability to navigate and make sense of their world. Unlike physical pain, cognitive dysfunction causes a welfare deficit that is harder for owners to recognise and respond to empathically. Many owners attribute CDS signs to normal ageing, delaying intervention that could improve quality of life. The welfare goal in CDS management is not cure — the condition is progressive and irreversible — but the maintenance of the best possible quality of life for as long as possible, with honest quality-of-life assessment guiding decisions about medical management and ultimately euthanasia timing.