Understanding canine cognitive dysfunction syndrome (CDS) — the equivalent of Alzheimer's disease in dogs — its recognition, progression, and the evidence-based approaches that improve quality of life.
Cognitive dysfunction syndrome causes genuine suffering in affected dogs, including confusion, anxiety, disrupted sleep, and loss of learned behaviors that were previously central to the dog's life. The welfare dimension extends to the human-animal bond: CDS changes the relationship in ways that are distressing for both dog and owner, and owners who do not recognize CDS often misattribute behavioral changes to stubbornness or regression. Early diagnosis allows earlier intervention — medical management, environmental modification, and enrichment — that slows progression and maintains quality of life. The compassionate end-of-life decision must be considered when CDS progresses to the point where distress cannot be adequately managed.