Dog Cushing’s Disease (Hyperadrenocorticism): Pot Belly, Thirst, and What Testing Involves
Increased thirst, panting, hair thinning, and a pot-bellied shape in a middle-aged or older dog may signal excess cortisol—confirm with veterinary testing.
Cushing’s disease in dogs—hyperadrenocorticism—means chronically high cortisol. Most cases are pituitary-dependent; a smaller share involve an adrenal tumour. Owners notice a pot-bellied appearance, increased thirst and urination, panting, hair loss or thin skin, recurring skin infections, and muscle wasting along the spine despite a sometimes ravenous appetite. Signs develop gradually and are easy to blame on “just getting old.” Screening and confirmatory endocrine tests are required before treatment; empirically starting medication without a diagnosis is unsafe.
Key takeaways
- Polyuria/polydipsia plus a pot belly and skin changes warrant endocrine evaluation.
- No single at-home symptom proves Cushing’s—testing is essential.
- Treatment aims to control signs and protect quality of life; monitoring is lifelong for most medical plans.
On this page
- Common clinical signs
- How vets approach testing
- Treatment overview
- What owners monitor at home
- FAQ
Signs that raise suspicion
- Drinking and urinating much more than before
- Pot-bellied appearance with muscle loss on the hindquarters and back
- Excessive panting at rest
- Symmetric hair thinning, especially on the trunk
- Recurrent pyoderma or slow-healing skin issues
- Increased appetite
- Lethargy or reduced exercise tolerance
Diabetes, kidney disease, and urinary infections can share some signs. That is why full work-ups matter before anyone labels the dog “Cushingoid” from appearance alone.
Testing pathway (high level)
Baseline bloodwork and urinalysis often show clues such as elevated ALP or dilute urine—but they are not confirmatory. Endocrine tests (for example ACTH stimulation or low-dose dexamethasone suppression, chosen by the clinician) help support the diagnosis. Imaging of the adrenal glands and advanced pituitary imaging are used selectively. Test selection and interpretation are specialist skills; online “cortisol calculators” are not a substitute.
Management themes
Medical management with veterinary-prescribed drugs that modulate cortisol production is common for pituitary-dependent disease. Adrenal tumours may involve surgical discussion at referral centres. The aim is clinical control—less thirst, better muscle and skin—while avoiding over-suppression that can cause dangerous cortisol deficiency. Recheck timing is not optional.
- Do not use leftover steroid or hormone products from other pets or people
- Report vomiting, collapse, or refusal to eat on treatment promptly—the dose may need urgent review
Home monitoring
- Track water intake roughly (how often bowls are refilled)
- Note pant intensity and activity on walks
- Photograph the coat and belly shape monthly
- Keep a list of all medications and supplements for every visit
Thirst and urination overlap with topics in our diabetes and senior care guides. Skin changes may relate to skin and itch pathways when infections recur.
Preparing for endocrine testing questions?
Our Diagnostics Support pathway helps you organise sign timelines and monitoring notes for your veterinary team.
FAQ
Is Cushing’s painful?
It is a systemic metabolic disease. Dogs may feel uncomfortable from panting, muscle weakness, and skin issues; many improve clinically when cortisol is controlled.
Can diet alone fix it?
No. Nutrition supports general health but does not replace specific endocrine therapy when indicated.
How long do dogs live with Cushing’s?
Outlook varies by cause, severity, other illnesses, and response to treatment. Your veterinarian gives the most honest range for your dog.
Educational content only. This page does not diagnose disease or replace care from a licensed veterinarian. Seek in-person help for emergencies or worsening symptoms.