Heart disease is the most common cause of death in older dogs and causes significant chronic welfare compromise, with Cavalier King Charles Spaniels facing a particularly severe breed predisposition.
Dogs with progressive heart disease experience gradually worsening exercise intolerance, respiratory distress, and in congestive heart failure, profound discomfort. Early detection through annual auscultation allows medication that measurably slows progression. Breed health protocols for CKCS and other predisposed breeds reduce the prevalence of suffering in future generations.