Addison's disease (hypoadrenocorticism) is an endocrine disorder where the adrenal glands fail to produce essential hormones. Well-managed dogs live normal lives, but the condition requires lifelong veterinary care.
Addison's disease is an excellent example of a condition where early diagnosis and appropriate management transform welfare outcomes. Undiagnosed Addison's causes repeated episodes of crisis - profound weakness, vomiting, collapse, and shock - that are frightening and physically debilitating. Dogs that go undiagnosed may experience multiple near-death crises before the diagnosis is made. Once diagnosed and appropriately supplemented, most Addisonian dogs have excellent quality of life indistinguishable from healthy dogs. The welfare challenge is maintaining consistent medication and recognizing when stress dosing is needed. Owners who understand the condition and have a good veterinary partnership maintain excellent welfare for their dogs. The condition's unpredictable presentation means owners benefit from clear emergency protocols and close communication with their vet.