Dog Cushing’s disease symptoms usually develop gradually and become more meaningful when several changes appear together. Increased drinking and urination, a stronger appetite, frequent panting, muscle loss, a pot-bellied shape, and skin or coat changes can form a suspicious pattern. However, no single symptom can confirm Cushing’s disease.
What Is Cushing’s Disease in Dogs?
Cushing’s disease, also called hyperadrenocorticism, develops when a dog’s body is exposed to excessive cortisol for an extended period. Cortisol helps regulate metabolism, stress responses, and immune function, but too much can affect muscles, skin, the urinary system, and other organs.
About 80% to 85% of naturally occurring cases are pituitary-dependent. In this form, a pituitary tumor releases too much ACTH, which signals the adrenal glands to produce cortisol. Other cases may be caused by an adrenal tumor. Long-term use of corticosteroid medications can also produce a medication-induced form of the condition.
Cushing’s disease is diagnosed most often in middle-aged and older dogs. A younger dog can develop hormone-related disease, but age alone is not a reason to assume that every change is Cushing’s.
Early Dog Cushing’s Disease Symptoms
1. Increased Drinking and Urination
One of the most noticeable early changes is a dog drinking more water than usual. Increased drinking may lead to larger urine volumes, more frequent bathroom trips, nighttime requests to go outside, or new accidents in the house.
Do not restrict access to water. Instead, track how often the bowl is refilled and whether the change continues for several days. Increased thirst and urination can also occur with diabetes, kidney disease, urinary problems, medications, and other conditions.
2. Increased Appetite
A dog with Cushing’s may appear unusually hungry, search for food, beg more often, or finish meals much faster. Increased appetite becomes more concerning when it appears with increased thirst, urination, panting, or body-shape changes.
Hunger alone is not specific. Activity changes, calorie restriction, diabetes, steroid medications, and learned food-seeking behavior can produce a similar pattern.
3. Panting Without an Obvious Reason
Dogs may pant after exercise, during hot weather, or when excited. With Cushing’s disease, panting may become noticeable during mild activity or while resting in a comfortable room.
Record a short video and note the temperature, recent activity, and how long the panting lasts. Labored breathing, pale or bluish gums, collapse, or severe weakness requires prompt veterinary attention rather than home monitoring.
4. A Pot-Bellied Shape and Muscle Loss
A rounded or sagging abdomen does not always mean that a dog has gained weight. Dogs with Cushing’s may lose muscle while their abdominal shape becomes more prominent. The thighs may look thinner, stairs may become harder, or the dog may tire more quickly.
Compare photos taken from the side and above. A gradual change in the waistline combined with weaker hind legs, increased panting, and increased thirst is more informative than body weight alone.
5. Skin and Coat Changes
Possible changes include thinning skin, slow wound healing, darkened areas, blackheads, recurrent skin infections, and hair loss over the trunk. Hormonal hair loss is often fairly symmetrical and may cause little or no itching.
Hair loss with intense itching may point first toward allergies, parasites, or infection. Skin appearance alone cannot identify the cause, so photographs and a veterinary skin examination are useful.
When Cushing’s Disease Should Move Higher on the List
This comparison can help separate a suspicious symptom cluster from a single common change.
| Observed pattern | What to suspect first | What else should be checked |
|---|---|---|
| More drinking, urination, and appetite | Cushing’s becomes possible when all three persist together | Diabetes, kidney disease, urinary disease, and medication effects |
| Pot belly, thinner legs, panting, and reduced stamina | Cushing’s deserves stronger consideration | Weight gain, liver disease, heart disease, pain, and reduced activity |
| Symmetrical trunk hair loss with little itching | An endocrine disorder may be considered | Hypothyroidism and other hormonal or hair-cycle disorders |
| Itchy hair loss or one skin infection | Allergy, parasites, or infection may be more likely initially | Cushing’s may still be investigated if infections repeatedly return |
| One isolated symptom that quickly resolves | Neither Cushing’s nor another chronic hormone disorder may be the answer | Temporary stress, weather, diet, or activity changes |
The strongest reason to contact a veterinarian is not one isolated sign. It is a consistent combination of changes that continues, progresses, or returns.
What to Record Before the Veterinary Visit
- How often the water bowl is filled and how much water remains
- Changes in urine volume, nighttime urination, or house accidents
- Changes in appetite, food stealing, or begging
- Resting panting videos and the room temperature
- Weekly side and top-view body photographs
- Skin infections, ear infections, hair loss, or slow-healing wounds
- Every medication, injection, ear product, skin cream, and supplement
Medication history is especially important because pills, injections, ear medications, and skin products may contain corticosteroids. Do not suddenly stop a prescribed steroid without instructions from the veterinarian.
How Veterinarians Check for Cushing’s Disease
A veterinarian usually begins with the dog’s history, physical examination, bloodwork, and urinalysis. These tests can identify changes that support Cushing’s disease and can also reveal diabetes, urinary infection, kidney problems, or other explanations.
Specific hormone tests may include a low-dose dexamethasone suppression test, an ACTH stimulation test, or a urine cortisol-to-creatinine ratio. Abdominal ultrasound and additional testing may be needed to determine whether the condition is pituitary-dependent or adrenal-dependent. A high screening result by itself does not always confirm Cushing’s because stress and other illnesses can affect some results.
A Short Louie Note
Louie is a two-year-old Yorkshire Terrier and has not shown this symptom pattern. Because he is young, routine observation is more useful than assuming that ordinary changes indicate Cushing’s disease. Keeping a normal baseline for his drinking, appetite, coat, body shape, and activity would make a persistent change easier to recognize.
The Bottom Line
Early Cushing’s disease is easier to suspect when several gradual changes appear together. Start by tracking water intake, urination, appetite, panting, muscle condition, and skin changes. Bring those records and a complete medication list to the veterinarian rather than trying to diagnose the condition from appearance alone.