Naturally occurring Cushing’s disease in dogs cannot be fully prevented. About 85% of cases are caused by a tiny tumor on the pituitary gland, and the remaining 15% stem from a tumor on the adrenal glands. There’s no vaccine, supplement, or lifestyle change that stops these tumors from forming. What you can do is reduce the risk of steroid-induced Cushing’s (the one preventable form), know whether your dog’s breed puts them at higher risk, and catch the disease early when treatment works best.
Steroid-Induced Cushing’s Is Preventable
The one type of Cushing’s disease you can actually prevent is iatrogenic hyperadrenocorticism, which happens when a dog receives corticosteroids for too long or at too high a dose. Steroids like prednisone and prednisolone are commonly prescribed for allergies, itchy skin, autoimmune conditions, and joint inflammation. They work well in the short term, but chronic use floods the body with cortisol-like compounds and can produce the exact same symptoms as a pituitary tumor: increased thirst, a pot belly, thinning skin, and hair loss.
One documented case involved a dog that developed full-blown Cushing’s syndrome and lung mineralization from a prednisolone dose of just 0.5 mg per kilogram of body weight per day, given chronically starting at four months of age. That’s considered a low dose. Another dog developed serious complications after receiving a higher dose (2.2 mg/kg/day) for four years. The takeaway: even modest steroid doses can cause problems over time.
If your dog is on long-term steroids, the most important thing you can do is work with your vet on a tapering plan. In the documented case above, the dog’s prednisolone was gradually reduced from twice daily to once every 72 hours, and symptoms improved. Never stop steroids abruptly, as that carries its own serious risks, but always ask whether the current dose is the lowest effective option and whether a non-steroidal alternative exists.
Non-Steroidal Alternatives for Chronic Conditions
If your dog needs long-term treatment for allergies, arthritis, or inflammation, several alternatives to corticosteroids can reduce or eliminate steroid exposure altogether. For osteoarthritis, a class of drugs called piprants blocks a specific pain and inflammation receptor without suppressing the broader protective functions that traditional anti-inflammatories can interfere with. This option is already licensed for dogs with mild to moderate joint pain.
For pain specifically, a newer approach uses antibody-based injections that target a protein involved in pain signaling. These are given monthly and are licensed for alleviating osteoarthritis pain in dogs without the hormonal side effects of steroids. For allergic skin disease, your vet may recommend targeted itch-relief medications that work on the immune pathways driving the allergic response rather than broadly suppressing the immune system the way corticosteroids do.
The point isn’t that steroids are never appropriate. Short courses for acute flare-ups are generally safe. The risk comes from months or years of daily use, which is exactly the pattern that leads to iatrogenic Cushing’s.
Breeds With Higher Risk
Certain breeds develop Cushing’s disease at dramatically higher rates than mixed-breed dogs. A large epidemiological study found Standard Schnauzers had 58 times the odds of developing the disease compared to mixed breeds. Fox Terriers had 20 times the odds. Other breeds with significantly elevated risk included Cavalier King Charles Spaniels, Boxers, Shih Tzus, Pit Bulls, Jack Russell Terriers, Maltese, Miniature Dachshunds, Miniature Poodles, and Yorkshire Terriers.
A separate UK study identified Bichon Frises (6 times the odds), Border Terriers (5.4 times), Miniature Schnauzers, Lhasa Apsos, and Staffordshire Bull Terriers as high-risk breeds. If your dog belongs to one of these breeds, it doesn’t mean they’ll get Cushing’s, but it does mean you should be especially cautious about chronic steroid use and more attentive to early symptoms as they age.
Recognizing Early Symptoms
Cushing’s disease typically appears in middle-aged to older dogs and develops slowly. The earliest signs are easy to dismiss or attribute to normal aging, which is exactly why the disease often goes undiagnosed for months. Increased thirst and urination are usually the first changes owners notice. Your dog may start draining the water bowl faster than usual, needing to go outside more frequently, or having accidents indoors.
Increased appetite is another early sign. Dogs with rising cortisol levels may act ravenous, beg more aggressively, or scavenge food they’d normally ignore. Reduced activity and excessive panting, especially at rest, are also common. As the disease progresses, you may see thinning skin that tears easily, patches of hair loss, recurring skin infections, and a gradually expanding belly that gives the dog a pot-bellied look even without weight gain elsewhere.
If you notice two or three of these signs together, particularly in a breed with higher risk or a dog over seven or eight years old, bring it up at your next vet visit. The primary screening tests for Cushing’s disease have sensitivities above 95%, so the condition is reliably detected once your vet decides to test for it. The challenge is recognizing it early enough to ask.
What Routine Monitoring Looks Like
For dogs on chronic steroids, regular bloodwork helps catch hormonal changes before full Cushing’s syndrome develops. Biannual health visits are recommended as a baseline for most dogs, but those on long-term corticosteroid therapy may need bloodwork more frequently, particularly to monitor liver enzymes and cortisol-related markers that shift before visible symptoms appear.
For high-risk breeds not on steroids, there’s no standard screening protocol for Cushing’s the way there is for, say, heartworm. The practical approach is to keep a mental checklist of the early signs listed above and mention any changes to your vet during routine checkups. A dog drinking noticeably more water, panting at rest, or losing hair symmetrically on both sides of the body warrants a closer look, even if each symptom alone seems minor.
What You Can Control
You can’t prevent pituitary or adrenal tumors from forming. There are no known dietary changes, supplements, or environmental modifications proven to reduce the risk of naturally occurring Cushing’s disease in dogs. But you can take three concrete steps that make a real difference: minimize your dog’s lifetime exposure to corticosteroids by using the lowest effective dose for the shortest time possible, ask about non-steroidal alternatives whenever long-term treatment is needed, and learn the early signs so the disease gets caught before it causes serious complications like skin breakdown, muscle wasting, or secondary infections.