Addison's Disease in Dogs: Managing Adrenal Insufficiency for Long-Term Welfare

Hypoadrenocorticism (Addison's disease) is a life-threatening but manageable endocrine disorder in dogs. Prompt diagnosis and lifelong hormone replacement allow most affected dogs to live normal, comfortable lives.

Key Facts

Addison's disease results from destruction of the adrenal cortex, usually immune-mediated, causing cortisol and aldosterone deficiency
It is often called "the great imitator" because symptoms — vomiting, lethargy, weakness — mimic many other conditions
Young to middle-aged female dogs are most commonly affected, with Standard Poodles, Portuguese Water Dogs, and Bearded Collies predisposed
Addisonian crisis is a life-threatening emergency causing cardiovascular collapse, electrolyte imbalance, and shock
Diagnosis requires an ACTH stimulation test confirming failure to produce cortisol in response to stimulation
Treatment with monthly desoxycorticosterone pivalate (DOCP) injections and daily prednisolone is highly effective

Welfare Considerations

Addison's disease causes significant welfare impact prior to diagnosis — affected dogs experience repeated episodes of weakness, nausea, and gastrointestinal distress that often lead to multiple inconclusive veterinary visits. Addisonian crisis represents acute severe suffering: the dog collapses, becomes profoundly weak, and without emergency treatment will die. Once diagnosed and stabilised, the welfare prognosis is excellent — most Addisonian dogs live normal lifespans with good quality of life on monthly DOCP injections and daily steroid supplementation. Owners must be educated to increase steroid dosing during periods of physical or psychological stress to prevent crisis. Medic alert tags and emergency protocols should be established. The heritable component in some breeds means breeding programmes should screen for and reduce the frequency of immune-mediated adrenal disease.

What You Can Do

If your dog has repeated episodes of weakness, vomiting, and lethargy, request an ACTH stimulation test
Always carry emergency steroid tablets for Addisonian dogs and brief caregivers on crisis protocols
Maintain regular electrolyte monitoring every 6 months once stabilised on DOCP
Support breed health committees working to reduce heritable Addison's disease in predisposed breeds