Congestive heart failure (CHF) is a common end-stage complication of cardiac disease in dogs, particularly mitral valve disease and dilated cardiomyopathy. Modern medical management can extend comfortable life significantly, but welfare-centred monitoring and end-of-life planning are essential.
CHF causes real suffering: breathlessness from pulmonary oedema is one of the most distressing experiences for any mammal — the sensation of not being able to breathe creates acute panic and distress. Dogs in decompensated CHF are dyspnoeic, anxious, and unable to rest comfortably. Medical management, when effective, relieves this: a well-compensated CHF dog is comfortable, active within its limits, and has good quality of life. The welfare imperative is monitoring closely enough to detect decompensation early (the resting respiratory rate tool is invaluable here) and to adjust medication before crisis. Euthanasia planned before severe respiratory compromise is the most welfare-positive end-of-life decision — waiting until the dog is in acute respiratory distress means the final hours involve significant suffering.