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TL;DR:
Cushing’s disease, also called hyperadrenocorticism, is a hormonal disorder, in which a dog’s body produces where the adrenal glands produce too much cortisol. Excess cortisol can affect metabolism, immune function, muscle strength, skin health, and behavior. As Cushing’s disease progresses, the condition itself and its complications can increasingly affect a dog’s comfort, mobility, appetite, sleep, and ability to enjoy normal activities.
This condition is most common in middle-aged to older dogs.
In advanced Cushing’s disease, dogs may experience worsening weakness, mobility problems, frequent accidents, persistent panting, infections, changes in appetite, or changes in behavior. These symptoms do not necessarily mean a dog is in the final days of life, but a pattern of worsening symptoms can indicate that the disease is having a greater effect on quality of life.
If your dog has been living with Cushing’s, this guide will help you recognize changes, understand what they may mean, and know when to talk with your veterinarian about comfort, treatment, hospice care, or euthanasia.
What the Final Stages of Cushing’s Disease Can Look Like
Cushing’s disease can cause increased thirst and urination, increased appetite, panting, muscle weakness, a pot-bellied appearance, hair loss, thinning skin, and recurring skin infections.
As the disease becomes more advanced, these symptoms may become harder to manage and can begin to interfere with your dog’s comfort and daily life.
Some dogs also develop complications related to their underlying Cushing’s disease. What matters most at this stage is not whether your dog has one specific symptom, but whether their overall comfort and quality of life are declining.
The end of Cushing’s disease doesn’t always follow a predictable path.But in the final stages, what pet parents really notice are things like:
- Sudden weakness or collapsing during short walks or when getting up
- Constant pacing or confusion. Your dog might walk in circles or seem lost in familiar spaces
- Refusing food, even favorite treats
- Frequent accidents, especially overnight
- Disengagement from family or lack of interest in toys, walks, or being touched
In many cases, these symptoms are tied to advanced changes in the pituitary gland (which signals the adrenal glands) or to an adrenal tumor, both of which can worsen over time if left untreated.
You may also start to notice a “change in the eyes”—a distant, foggy look that’s hard to describe but feels unmistakably different. Some dogs also develop secondary conditions like infections or respiratory issues that compound their suffering.
It’s not always dramatic. Sometimes it’s a slow, heartbreaking realization: They’re just not themselves anymore.
5 Changes Families May Notice in Advanced Cushing’s Disease: Some Real-Life Examples
1. Loss of Appetite and Extreme Lethargy
A 12-year-old Labrador who once devoured every meal now won’t eat—even favorite treats.
Why it matters: Labs are notorious for their appetite. When a Lab refuses food, it often means the body is in serious decline.
In other dogs, loss of appetite and severe lethargy can indicate that your dog’s overall health or quality of life is declining. These signs can have multiple causes, so your veterinarian should help determine what is happening.
2. Frequent Accidents Indoors
A senior poodle urinates inside several times a day, even after just going outside, and no longer reacts to being called.
This can also be linked to increased urination, a common symptom in Cushing’s due to hormone imbalances affecting kidney function and thirst regulation.
Why it matters: House-trained dogs losing control or awareness signals cognitive changes, discomfort, or both.
3. Restlessness, Panting, and Anxiety
A border collie paces all night, pants excessively even in cool weather, and startles at small noises.
Why it matters: Dogs in distress often can’t rest. Panting at rest or in a cool room indicates pain, anxiety, or endocrine imbalance.
4. Recurring Skin Infections
A beagle develops open wounds and constant hotspots that don’t heal despite vet care.
Chronic hair loss and slow-healing wounds are also common in dogs with elevated cortisol levels, which can suppress the immune system and impair skin repair.
Why it matters: Cushing’s disease can impair immune function and skin health, making some dogs more prone to recurring infections and slow-healing skin problems. Persistent infections can add discomfort and further reduce quality of life.
5. Collapse and Confusion
A terrier collapses after short walks, stares into corners, and sometimes seems “not there.”
Why it matters: Collapse, severe weakness, or disorientation can have several causes and warrant veterinary evaluation. When these changes are persistent or occur alongside other signs of advanced disease, they may indicate a significant decline in quality of life.
Caring for a Dog With Advanced Cushing’s Disease
When a dog enters the last stages of Cushing’s disease, the focus changes from managing the condition to keeping your dog as comfortable and supported as possible.
If your dog’s quality of life continues to decline despite treatment, your veterinarian may also discuss hospice or palliative care and help you understand when euthanasia may become a kind option.
Small changes can make a big difference:
- Add rugs or traction mats to help with slipping.
- Keep a consistent, calm routine.
- Offer soft, palatable foods Track their daily comfort using a simple checklist.
- Have honest conversations with your vet about what comes next.
If your dog has been on treatment options like trilostane (a drug commonly used to reduce cortisol levels), your vet may reassess whether continuing treatment is appropriate based on your dog’s appetite and energy levels.
At this point, your vet may also guide you through preparing for hospice-style care or the in-home euthanasia option.
When Does It Stop Being “Manageable”?
The question is not simply whether your dog has Cushing’s disease. The more important question is how the disease is affecting their daily comfort and ability to enjoy life.
Track your dog’s comfort and quality of life over time and ensure that the following are true:
☐ Eating at least half of their usual meals
☐ Able to walk without falling or extreme effort
☐ Resting comfortably without panting or pacing
☐ Still responds to your voice or touch
☐ Seems to have more good days than bad
☐ Not showing signs of pain (whining, restlessness, hiding)
☐ You feel able to manage their care without burnout
If you’re checking “no” to several of these, it may be time to talk about what comes next.
Considering Euthanasia
At some point, the question shifts from “How do we treat this?” to “Are they still comfortable?”
For a dog with advanced Cushing’s disease, euthanasia may be considered when symptoms and complications can no longer be adequately managed and your dog is consistently uncomfortable or no longer able to enjoy daily life.
The diagnosis itself does not determine when euthanasia is appropriate. Your dog’s comfort, quality of life, response to treatment, and overall health are more important factors.
This is often one of the hardest decisions a pet owner will ever make. But it can also be a final act of love: giving your dog peace when their body is no longer able to rest, recover, or enjoy life without distress.
If you’re unsure what this process involves, we’ve created a detailed guide that walks you through what to expect and how to prepare:
How Does Pet Euthanasia Work – What Happens and What to Expect
If your dog has advanced Cushing’s disease and you are beginning to think about euthanasia, Compassionate Care provides 24/7 in-home pet euthanasia throughout the Portland metro area, Vancouver, Salem, and nearby communities.
Our veterinarians come to your home, allowing your dog to remain in familiar surroundings rather than making one more stressful trip to a clinic.
We know that deciding when to say goodbye can be difficult, especially when your dog has been living with a chronic disease like Cushing’s. You don’t have to have every decision figured out before you call. Our team can explain what to expect, answer questions about the process, and help you understand your options.
Our goal is to keep you informed so you can make the decision that’s right for your dog and your family.
FAQs About Cushing’s Disease in the Final Stage
How is Cushing’s disease diagnosed?
Most cases are diagnosed using blood tests that measure cortisol levels, including an ACTH stimulation test. This helps your vet understand how your dog’s adrenal system is functioning and confirm if treatment is needed.
Is there a difference between typical aging and late-stage Cushing’s symptoms?
Yes. While aging dogs may slow down gradually, late-stage Cushing’s often causes sudden or extreme changes, like rapid muscle loss, obsessive pacing, or recurring infections, that go beyond normal senior changes.
Do dogs with Cushing’s disease know they are sick?
Dogs may not understand illness the way humans do, but they often sense discomfort or changes in their routine. In late-stage Cushing’s, many dogs appear anxious, withdrawn, or unsettled. These are signs they’re no longer feeling secure in their bodies.
Can late-stage Cushing’s cause neurological symptoms?
Yes. Advanced Cushing’s can sometimes lead to confusion, circling, head pressing, or staring into space, especially if a pituitary tumor is involved. These signs may indicate the brain is being affected.
Should I still give medications in the final stage of Cushing’s?
It depends. If your dog is no longer eating, vomiting, or experiencing side effects, it may be time to shift away from disease-targeted meds and focus on palliative care. Talk to your vet about what’s still helping versus what may be adding stress.
Is late-stage Cushing’s painful for dogs?
While Cushing’s itself isn’t always painful, the complications can be. Muscle loss, infections, anxiety, and internal organ strain can cause discomfort or distress, especially if symptoms are unmanaged.
Can dogs recover from late-stage Cushing’s?
Once a dog enters the final stages, recovery is unlikely. Focus shifts to keeping your dog as comfortable as possible and preparing for decisions like hospice care or euthanasia.
