Canine cognitive dysfunction syndrome (CDS) is a neurodegenerative condition in older dogs that causes significant welfare harm and is frequently underdiagnosed.
Cognitive dysfunction syndrome causes genuine suffering in affected dogs — disorientation, nighttime restlessness, anxiety, and loss of previously learned behaviors create confusion and distress. Dogs with CDS may vocalize at night, become anxious in familiar environments, or show apparent loss of recognition of family members. These signs represent real welfare harms, not merely inconveniences for owners. Early recognition and diagnosis allows intervention before severe deterioration occurs. Treatment options are limited but include licensed medication, dietary supplements with some evidence of benefit, environmental modifications to reduce confusion, and enrichment programs that may slow cognitive decline. Quality of life assessment tools help owners and vets make informed decisions about when treatment is no longer providing benefit.