# Dog Cushing's Disease: What to Expect from Diagnosis to Daily Management


## Key Takeaways

- Cushing's disease (hyperadrenocorticism) is a treatable hormonal disorder caused by excessive cortisol production, most commonly due to a benign pituitary tumor (80-85% of cases) or less frequently an adrenal tumor.
- Initial diagnostic steps involve a physical exam, urinalysis for dilution, and specific blood tests such as the low-dose dexamethasone suppression test or ACTH stimulation test to assess adrenal gland function.
- Common clinical signs include increased thirst and urination, increased appetite, symmetrical hair loss, a pot-bellied appearance, and easily bruised skin, which can overlap with conditions like chronic kidney disease and diabetes mellitus.
- Treatment primarily involves lifelong oral medication (trilostane or mitotane) to reduce cortisol production, requiring careful dosing and regular monitoring via ACTH stimulation tests and bloodwork to prevent dangerous cortisol deficiency.
- Emergency signs requiring immediate veterinary attention include collapse, seizures, difficulty breathing, or vomiting with an enlarged, painful abdomen, which may indicate life-threatening complications like blood clots or pancreatitis.
- Home management includes ensuring constant access to fresh water, frequent urination opportunities, maintaining a consistent routine, avoiding strenuous exercise in heat, and never administering human medications or altering prescribed dosages without veterinary guidance.

---

If your dog has been drinking more water, eating more, or losing hair in a symmetrical pattern, you may be worried about Cushing's disease. Here is the short version: Cushing's disease is a treatable hormonal condition, not a death sentence. Most dogs live comfortably for years with proper medication and monitoring. The key is getting an accurate diagnosis and following your veterinarian's plan closely.

You are not alone in feeling overwhelmed. The diagnostic process can take several weeks, and treatment requires regular checkups. But the signs you are noticing are real, and they can be managed. This guide walks you through what happens next, from the first blood test to long-term care at home.

## Is This an Emergency?

Cushing's disease itself rarely causes a sudden crisis. However, some signs that look like Cushing's can actually be emergencies. Use this table to decide your next step.


<!-- figure:auto -->
```figure
{
 "type": "triage",
 "title": "Urgency triage by severity of signs",
 "tiers": [
  {
   "tier": "danger",
   "label": "Go to an emergency vet now",
   "signs": [
    "Collapse, seizures, difficulty breathing, vomiting with an enlarged or painful belly, or straining to urinate with no urine produced"
   ],
   "action": [
    "Call your nearest emergency hospital and go immediately",
    "These signs can indicate a life-threatening crisis such as a blood clot, pancreatitis, or a blocked bladder"
   ]
  },
  {
   "tier": "warn",
   "label": "Book a same-day appointment",
   "signs": [
    "Sudden weakness in the back legs, excessive panting that does not settle, or a distended, firm belly that seems painful"
   ],
   "action": [
    "Call your regular vet when they open",
    "These signs need an exam today, not next week"
   ]
  },
  {
   "tier": "safe",
   "label": "Watch at home for 7 to 10 days",
   "signs": [
    "Increased thirst, increased urination, increased appetite, hair loss, a pot-bellied appearance, or skin that bruises easily"
   ],
   "action": [
    "Schedule a routine appointment",
    "Track how many times your dog drinks per day and how often they need to go out",
    "Bring that log to the visit"
   ]
  }
 ]
}
```

| Urgency Level | Signs to Watch For | What to Do |
|---|---|---|
| Go to an emergency vet now | Collapse, seizures, difficulty breathing, vomiting with an enlarged or painful belly, or straining to urinate with no urine produced | Call your nearest emergency hospital and go immediately. These signs can indicate a life-threatening crisis such as a blood clot, pancreatitis, or a blocked bladder. |
| Book a same-day appointment | Sudden weakness in the back legs, excessive panting that does not settle, or a distended, firm belly that seems painful | Call your regular vet when they open. These signs need an exam today, not next week. |
| Watch at home for 7 to 10 days | Increased thirst, increased urination, increased appetite, hair loss, a pot-bellied appearance, or skin that bruises easily | Schedule a routine appointment. Track how many times your dog drinks per day and how often they need to go out. Bring that log to the visit. |

If you are ever unsure, call your veterinary clinic. They can tell you whether your dog needs to be seen urgently.

## What Is Cushing's Disease?

Cushing's disease, also called hyperadrenocorticism, happens when the adrenal glands produce too much cortisol. Cortisol is a natural steroid hormone that helps your dog manage stress, inflammation, and energy. When levels stay too high for too long, the body starts to show wear and tear.

The most common cause is a small, benign tumor on the pituitary gland at the base of the brain. This tumor sends constant signals telling the adrenal glands to make more cortisol. This accounts for about 80 to 85 percent of cases. The second cause is a tumor on one of the adrenal glands themselves, which sits near the kidneys. That is less common but still treatable.

Cushing's is most often diagnosed in middle-aged and older dogs. Breeds like poodles, dachshunds, and terriers seem to be overrepresented, but any dog can develop it. The condition develops slowly, which is why many owners mistake the early signs for normal aging.

## What Else Could It Be?

Many Cushing's signs overlap with other conditions. Your veterinarian will need to rule these out before confirming the diagnosis.

- **Chronic kidney disease** causes increased thirst and urination. It is common in older dogs and requires different treatment. The [International Renal Interest Society staging guidelines](http://www.iris-kidney.com/guidelines/) describe how vets stage kidney disease to guide care.
- **Diabetes mellitus** also causes increased thirst, urination, and appetite. A simple blood sugar test can distinguish it from Cushing's.
- **Underactive thyroid, or hypothyroidism**, causes hair loss and weight gain, but it does not usually cause increased thirst.
- **Urinary tract infections** can cause frequent urination. Cushing's dogs are prone to these infections, so your vet may test urine even if your dog shows no obvious discomfort.

Because these conditions share signs, your vet will run a panel of tests instead of a single test. This is normal and expected. The [American Animal Hospital Association senior care guidelines](https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/) recommend a full workup for older pets with new signs, because multiple problems often exist at once.

## How the Diagnosis Is Made

Your veterinarian will start with a physical exam and a urine test. The urine will be checked for dilution, which is a hallmark of Cushing's. If the urine is very watery, the next step is usually a blood test called a low-dose dexamethasone suppression test. Your dog receives a small injection of a synthetic steroid, and blood is drawn a few hours later. High cortisol afterward points to Cushing's.

Another option is an ACTH stimulation test. This measures how well the adrenal glands respond to a hormone that normally triggers cortisol release. Both tests have strengths and weaknesses. Your vet may repeat a test if the first result is borderline.

Imaging, such as an ultrasound, can help tell whether the problem is in the pituitary or the adrenal gland. This matters for choosing the right treatment. The whole process can take a few weeks. Patience is important, because treating the wrong condition can make your dog worse.

## What Treatment Looks Like

Most dogs are treated with oral medication that lowers cortisol production. The two main drugs are trilostane and mitotane. Both are effective, but they require careful dosing. Your veterinarian will calculate the starting dose based on your dog's weight and health status. You must never adjust the dose yourself. Giving too much can cause a dangerous drop in cortisol, leading to weakness, vomiting, or collapse.

The first month of treatment involves frequent rechecks. Your vet will run blood tests to see how your dog is responding. Doses are often adjusted during this period. After that, most dogs need a recheck every three to six months. The [American Veterinary Medical Association pet owner resources](https://www.avma.org/resources-tools/pet-owners) emphasize that chronic conditions like this need ongoing partnership with your vet, not a one-time fix.

Surgery is an option for adrenal tumors that have not spread. It is a major abdominal surgery with real risks, so it is usually reserved for younger dogs with clear surgical margins. Radiation therapy is rarely used, mainly for very large pituitary tumors pressing on the brain. For the vast majority of dogs, daily medication is the safest and most practical path.

## What You Can Do at Home Right Now

If your dog has been diagnosed with Cushing's disease, or you suspect it, there are safe things you can do at home while you work with your veterinarian. Do not start any treatment, change food, or give supplements without veterinary guidance. The underlying cause must be confirmed first, because several conditions look similar to Cushing's and need different care.

What you can do today:

- Keep fresh water available at all times. Dogs with Cushing's drink more and urinate more. Restricting water is dangerous and can cause dehydration.
- Take your dog out more often. Accidents in the house are a sign of the disease, not a behavior problem. Punishing your dog for urinating indoors will only add stress.
- Keep a consistent daily routine. Cushing's dogs often have low energy and may be sensitive to heat. Short, gentle walks are fine. Avoid strenuous exercise in hot weather.
- Do not shave or clip your dog's coat to manage hair loss. The skin is fragile and can be easily injured. Let your veterinarian guide any grooming decisions.
- Do not give any human medication, including pain relievers or allergy drugs. Some are toxic to dogs, and others can interfere with Cushing's treatment.

## What to Write Down Before Calling Your Vet

A few days of simple notes will help your veterinarian make better decisions. Write down:

- How many times per day your dog drinks from the bowl, and roughly how much. If you cannot measure, note whether you are refilling the bowl more than once a day.
- How many times your dog urinates in 24 hours, and whether there are accidents in the house.
- How much your dog eats at each meal, and whether appetite has increased.
- Any changes in energy, such as how long your dog naps or how far they walk before tiring.
- Any skin changes, including thinning, dark patches, scabs, or slow-healing sores.
- Any panting that seems excessive, especially at rest or at night.
- Your dog's weight, if you can weigh them at home.

Bring this list to every appointment. It gives your veterinarian a baseline to compare against after treatment starts.

## What a Veterinary Visit Usually Involves

The first visit for suspected Cushing's usually includes a full physical exam. Your veterinarian will feel your dog's abdomen, listen to the heart and lungs, check the skin and coat, and take a temperature. They will ask about the signs you have noticed and how long they have been present.

Diagnosis typically requires bloodwork. A complete blood count and chemistry panel check liver enzymes, kidney values, and other markers. Cushing's often raises certain liver enzymes, but that finding alone is not proof of the disease. Your veterinarian will likely recommend one or more specific hormone tests, such as a low-dose dexamethasone suppression test or an ACTH stimulation test. These measure how the adrenal glands respond to stimulation. Ultrasound may be used to look at the adrenal glands and rule out other problems.

Cost varies widely by region and clinic. A basic diagnostic workup with bloodwork and a hormone test can range from roughly $200 to $600. Ultrasound adds more, often $300 to $800. These are general ranges only, not quotes. Prices depend on your location, the clinic, and whether complications arise. Ask for an estimate before testing begins.

## Treatment Options Compared

Treatment depends on the type of Cushing's disease. Most dogs have pituitary-dependent Cushing's, where a benign tumor in the pituitary gland signals the adrenal glands to overproduce cortisol. A smaller number have adrenal tumors. Surgery and radiation are options in specific cases, but medication is the most common path.

| Treatment | How It Works | Typical Use | What Owners Should Know |
| --- | --- | --- | --- |
| Medication (trilostane or mitotane) | Reduces cortisol production in the adrenal glands | Daily or twice-daily oral medication for life | Requires regular blood tests to adjust the dose. Side effects can include vomiting, diarrhea, lethargy, or poor appetite. Dosing must come from your veterinarian. |
| Surgery (adrenal tumor removal) | Removes the tumor | Only for certain adrenal tumors, if the tumor has not spread | Major abdominal surgery. Not all dogs are candidates. Requires a specialist and careful aftercare. |
| Radiation therapy | Shrinks a large pituitary tumor | For dogs with neurologic signs from a pituitary tumor | Requires multiple sessions under anesthesia. May reduce the need for medication but does not cure the disease. |

Most dogs do well on medication, but the dose is not one-size-fits-all. Your veterinarian will start at a low dose and adjust based on blood test results. Never change the dose on your own.

## Monitoring Schedule for Follow-Up Tests

Cushing's treatment requires lifelong monitoring. The goal is to control signs without pushing cortisol too low, which can be dangerous. A typical schedule looks like this:

| Time Point | What Happens | Why It Matters |
| --- | --- | --- |
| 10 to 14 days after starting medication | ACTH stimulation test and clinical check | Confirms the dose is working and not too strong |
| 4 weeks after any dose change | Repeat ACTH stimulation test | Ensures the new dose is safe |
| Every 3 to 6 months | Bloodwork, urine test, physical exam | Tracks disease control and catches complications early |
| Any time signs return | Repeat testing | May signal the dose needs adjustment |

Watch for signs that cortisol has dropped too low. These include vomiting, diarrhea, weakness, collapse, or a sudden loss of appetite. If any of these occur, stop the medication and contact your veterinarian immediately. Do not wait for a scheduled appointment.

## When an Online Vet Can Help, and When It Cannot

Some situations in this article require hands-on care and must not be handled remotely. If your dog collapses, has a seizure, vomits repeatedly, cannot stand, or stops eating and drinking, seek in-person emergency care immediately. A remote consultation cannot stabilize a dog in crisis. Likewise, a first diagnosis of Cushing's cannot be made over video. Bloodwork, hormone tests, and imaging require a physical visit.

A remote consultation is genuinely useful in other situations. If your dog has mild signs and you are unsure whether a visit is needed, an online vet can help you decide. If your dog is already diagnosed and you have a question about a medication side effect, a remote vet can advise. If your dog is stable on treatment and you need a recheck between blood tests, that can work well.

What a remote vet can do: take a detailed history, look at visible signs on video, answer questions, and in many states prescribe medication. What a remote vet cannot do: feel the abdomen, listen to the heart and lungs, take a temperature, run bloodwork, or image anything. Prescribing rules differ by state, and a veterinarian may require an in-person examination before prescribing. Use remote care as a complement to your regular veterinarian, not a replacement for hands-on diagnosis and monitoring.

## Common Mistakes Owners Make and What to Do Instead

Many owners look back and wish they had known a few things sooner. You can learn from their experience.

**Mistake: Stopping medication when the dog seems better.** Cushing's disease is managed, not cured. If you stop the medicine because your dog looks great, the signs will slowly return. Follow the schedule your veterinarian set, even on good days.

**Mistake: Changing the dose on your own.** More medicine does not mean better control. Too much can cause weakness, vomiting, or a dangerous drop in cortisol, the hormone that helps the body handle stress. Only your veterinarian can adjust the dose based on test results.

**Mistake: Waiting for the next appointment to report problems.** If your dog vomits, has diarrhea, or seems unusually tired after starting treatment, call your clinic the same day. Early changes are easier to correct than advanced ones.

**Mistake: Assuming thirst and urination will fix themselves.** These signs are often the first to improve with treatment. If they do not improve within a few weeks, tell your vet. The dose may need adjustment.

**Mistake: Skipping follow-up blood tests to save money.** These tests are how your vet knows the dose is right. Without them, you are guessing. Most dogs need a test called an ACTH stimulation test a few weeks after starting or changing medication, then every few months.

| Common mistake | Better action |
| --- | --- |
| Stopping medicine when the dog looks well | Keep giving the medicine on schedule |
| Adjusting the dose yourself | Call your vet for any dose change |
| Ignoring vomiting or lethargy after a dose | Contact your clinic the same day |
| Skipping follow-up blood tests | Keep every monitoring appointment |
| Expecting instant results | Allow 2 to 4 weeks for visible change |

## How to Reduce the Chance of It Happening Again

Cushing's disease usually comes from a small tumor on the pituitary gland or, less often, the adrenal gland. You cannot prevent that tumor. What you can do is catch problems early and protect your dog from related complications.

Keep a simple log of water intake, urination frequency, and appetite. Write down how many times your dog drinks in a day and how many times you let them out. Bring that log to every visit. The American Animal Hospital Association emphasizes regular health assessments for senior dogs, and this kind of record makes those assessments far more useful.

Watch for urinary tract infections. Dogs with Cushing's disease have dilute urine, which makes infections more likely. If your dog starts straining to urinate or has accidents in the house, ask your vet to check a urine sample.

Manage other conditions carefully. Cushing's disease can raise blood pressure and affect the kidneys. The International Renal Interest Society staging guidelines help veterinarians track kidney health in dogs with chronic disease, so keep up with blood pressure checks and kidney blood work if your vet recommends them.

## What Recovery and Ongoing Management Usually Look Like

Most dogs improve noticeably within 2 to 4 weeks of starting medication. Drinking and urinating usually return to normal first. Appetite and energy follow. Coat and skin changes can take 3 to 6 months to resolve.

This is a lifelong condition. Your dog will need medication twice a day or once a day, depending on the drug and your vet's plan. Many dogs live happily for years with good control.

You will visit the vet more often than before. Expect a check and blood test 10 to 14 days after starting treatment, again at 30 days, then every 3 to 6 months. Each visit is short and routine.

Some dogs need dose changes over time. That is normal. The disease can progress, and the medication may need to follow. Your vet will guide you through each adjustment.

Surgery or radiation is an option for some dogs, usually when the tumor is on the adrenal gland or when medication does not control the signs. These treatments require referral to a specialist and a longer recovery period. Most dogs, however, do well on medication alone.

## Frequently Asked Questions

**Will my dog need medicine for the rest of their life?**
Yes, in most cases. Cushing's disease is a chronic condition, and medication controls the signs instead of curing the disease. Your dog will likely take the same drug every day for life. The dose may change over time as your vet monitors blood tests. Some dogs with adrenal tumors can be cured by surgery, but that is less common. Plan for lifelong management and budget for regular blood tests.

**How quickly will I see improvement?**
Most owners notice better drinking and urination within 2 to 4 weeks. Appetite often improves around the same time. Skin and coat changes take longer, usually 3 to 6 months. If you see no improvement after a month, tell your vet. The dose may need adjusting, or another condition may be present.

**Can I give my dog over-the-counter supplements instead?**
No. Supplements are not a substitute for prescription medication. Some products claim to support adrenal health, but they have not been proven to control Cushing's disease. Untreated Cushing's can lead to diabetes, blood clots, or infections. Use only the medication your veterinarian prescribes, and ask before adding anything else.

**What are the signs of too much medication?**
Too much medication causes low cortisol. Watch for vomiting, diarrhea, weakness, lethargy, or collapse. If your dog shows any of these, call your vet immediately. In severe cases, low cortisol can be life-threatening and needs emergency care. Your vet will tell you what to watch for and when to come in.

**Is Cushing's disease painful for dogs?**
The disease itself is not usually painful. The signs, such as thinning skin, muscle weakness, and frequent urination, can make a dog uncomfortable. Treatment relieves most of these signs. If your dog seems painful, that could point to another problem like arthritis or a urinary infection. The American Veterinary Medical Association offers guidance on recognizing pain in pets, so ask your vet if you are unsure.

**How much does treatment cost per month?**
Costs vary widely by region, clinic, and the drug prescribed. Medication alone can range from roughly $50 to $200 per month. Blood tests add more, often $150 to $300 per test. Monitoring visits happen every few months, not monthly. Ask your clinic for a written estimate before starting treatment so you can plan.

## Related Clinical & Scientific Guides

* [How to Help Your Senior Cat with Mobility Issues: Tips and Products](/knowledge/veterinary-medicine/senior-and-chronic-care/senior-cat-mobility-help)
* [How to Prepare Your Cat for a Vet Visit for Kidney Disease](/knowledge/veterinary-medicine/senior-and-chronic-care/prepare-cat-vet-visit-kidney-disease)
* [What Blood Tests Does My Senior Dog Need and What Do They Cost?](/knowledge/veterinary-medicine/senior-and-chronic-care/senior-dog-blood-tests-cost)


## References and Further Reading

- [AAHA Senior Care Guidelines for Dogs and Cats](https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/)
- [International Renal Interest Society Staging Guidelines](http://www.iris-kidney.com/guidelines/)
- [AVMA Pet Owner Resources](https://www.avma.org/resources-tools/pet-owners)
- [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners)
- [AAHA Pet Owner Resources](https://www.aaha.org/for-pet-parents/)

## Related Articles

- [Dog Cushing's Disease: How to Tell If Your Dog's Medication Is Working](/knowledge/veterinary-medicine/senior-and-chronic-care/dog-cushings-disease-medication-monitoring)
- [How to Tell If Your Dog's Increased Thirst Is a Sign of Cushing's Disease](/knowledge/veterinary-medicine/senior-and-chronic-care/dog-increased-thirst-cushings-disease)
- [Dog Addison's Disease: How to Manage a Crisis at Home](/knowledge/veterinary-medicine/senior-and-chronic-care/dog-addisons-disease-crisis-management)
- [Dog Heart Disease: How to Monitor Your Dog's Condition at Home](/knowledge/veterinary-medicine/senior-and-chronic-care/dog-heart-disease-home-monitoring)
- [What to Expect at Your Dog's Vet Visit for a Heart Murmur](/knowledge/veterinary-medicine/senior-and-chronic-care/dog-heart-murmur-vet-visit)

> This article is general educational information for pet owners. It is not a substitute for veterinary diagnosis, examination, or treatment. If your pet is showing severe or rapidly worsening signs, contact an emergency veterinary hospital immediately.