Cushing Disease in Dogs: Long-Term Welfare Management

Canine hyperadrenocorticism (Cushing disease) is a common endocrine disorder in middle-aged and older dogs that causes a constellation of distressing symptoms and requires lifelong management to maintain quality of life.

Key Facts

Cushing disease is caused by excess cortisol production, most commonly from a pituitary adenoma
It affects an estimated 1-2 per 1000 dogs annually, with higher rates in certain breeds including Poodles, Dachshunds and Boxers
Classic signs include increased thirst and urination, pot-bellied appearance, hair loss, skin thinning and lethargy
Without treatment, the condition progresses to severe weakness, recurrent infections and significantly shortened lifespan
Two main treatment options exist: trilostane and mitotane, both of which suppress adrenal cortisol production
Regular monitoring with ACTH stimulation tests is required to ensure safe and effective cortisol control
Some dogs experience Addisonian crises from over-suppression, which is a life-threatening emergency
With appropriate management, many dogs live comfortably for several years following diagnosis

Welfare Considerations

Untreated or poorly controlled Cushing disease causes significant ongoing suffering. Excessive thirst and urination disrupt normal behaviour patterns and cause distress when dogs are unable to urinate as frequently as needed. Muscle wasting leads to weakness and reduced mobility. Skin changes cause itching and discomfort. Secondary conditions including hypertension, diabetes mellitus, urinary tract infections and pulmonary thromboembolism are common and serious. The chronic, progressive nature of the condition means that welfare is compromised for an extended period before diagnosis in many cases. With good management, welfare can be substantially restored, but monitoring demands and drug side effects require ongoing veterinary partnership with owners.

What You Can Do

Seek veterinary attention promptly if your dog shows classic Cushing signs such as increased drinking, a rounded belly or symmetrical hair loss
Work closely with your vet to establish appropriate trilostane dosing and monitoring schedules
Learn to recognise signs of Addisonian crisis including weakness and collapse, which require emergency care
Join owner support communities to share management experiences with other dog owners
Ensure your dog can access outdoor toileting frequently to reduce distress from increased urination
Support breed health initiatives aimed at reducing the genetic predisposition to pituitary tumours in high-risk breeds