Addison’s disease (hypoadrenocorticism) in dogs is known as "the great pretender" because its symptoms are often vague, mimicking other illnesses, and tend to wax and wane. Key signs include chronic lethargy, vomiting, diarrhea, anorexia, weight loss, and increased thirst/urination. A critical, sudden collapse (Addisonian crisis) can also occur.

What are the early symptoms of Addison's disease in dogs?

Clinical signs

• Lethargy.
• Loss of appetite.
• Vomiting.
• Diarrhea.
• Weight loss.
• Increased thirst and urination.
• Trembling.
• Weakness.

What breeds of dogs are prone to Addison's disease?

While any dog can get Addison's disease, certain breeds have a higher genetic predisposition, including Bearded Collies, Standard Poodles, Great Danes, Nova Scotia Duck Tolling Retrievers, Portuguese Water Dogs, and West Highland White Terriers, with Rottweilers, Soft Coated Wheaten Terriers, and Leonbergers also being overrepresented. It's an endocrine disorder where adrenal glands don't produce enough hormones, often striking young to middle-aged female dogs.
 

At what age do dogs develop Addison's disease?

Addison's disease occurs most commonly in young to middle-aged female dogs. The average age at diagnosis is about 4 years old. The signs of Addison's disease may be severe and appear suddenly or may occur intermittently and vary in severity.

What can mimic Addison's disease in dogs?

vulpis infections are reported as causing hyponatremia and hyperkalemia [4–7]. Although this kind of syndrome (pseudo-Addison disease) due to T. vulpis infection has been reported, its pathogenesis is not well understood. The symptoms mimic those of Addison's disease with waxing and waning weakness.

Addison's Disease in Dogs

What are the red flags of Addison's disease?

Red flags for Addison's disease include extreme fatigue, unexplained weight loss, darkening skin (hyperpigmentation), salt cravings, low blood pressure (causing dizziness), abdominal pain, nausea, vomiting, and diarrhea, which can worsen into a life-threatening adrenal crisis with severe pain, confusion, and shock. These symptoms often develop slowly but can appear suddenly during stress or illness, requiring immediate medical attention.

What are the signs of adrenal gland problems in dogs?

Dogs with atypical Addison disease can have low blood levels of cortisol but normal levels of sodium, potassium, and chloride. Signs of Addison disease include repeated episodes of vomiting and diarrhea, loss of appetite, dehydration, and a gradual loss of body condition. Weight loss is often severe.

What are the early signs of Addison's?

Symptoms of Addison's disease

• fatigue (lack of energy or motivation)
• lethargy (abnormal drowsiness or tiredness)
• muscle weakness.
• low mood (mild depression) or irritability.
• loss of appetite and unintentional weight loss.
• the need to urinate frequently.
• increased thirst.
• craving for salty foods.

What not to feed a dog with Addison's disease?

Avoid low-protein diets unless your vet advises it for another medical condition (like kidney disease). Dogs with Addison's often have low sodium and high potassium levels. Their treatment usually addresses this, but it's wise to avoid low-sodium dog foods and consult your vet before adding supplements.

Is exercise good for dogs with Addison's disease?

No clinically relevant changes in blood chemistry, blood cell count, blood pressure and electrocar- diography (ECG) were noted before and shortly after the task. Results of this study suggest that jogging at a mod- erate speed is not harmful to the health of dogs with Addi- son's disease.

Do dogs with Addison's pee a lot?

Signs of Addison's in dogs typically include weakness, lethargy, lack of appetite, depression, reluctance to exercise, vomiting and diarrhoea. These may appear very suddenly and can be both intermittent and severe. Dogs suffering from the illness may also drink more and urinate more.

What potential clinical signs in a dog with Addison's include decreased appetite and extreme fatigue?

Clinical Findings of Addison Disease in Animals

Usually, GI signs predominate, including loss of appetite, weight loss, vomiting, and diarrhea. Lethargy is common, and polyuria/polydipsia is also reported. These signs can wax and wane, and they are typically brought on or exacerbated by stress.

How much does it cost to treat Addison's disease in dogs?

The monthly cost for Addison's disease treatment can range from $50 to $200 a month, depending on the selected medications and the animal's response to care. The vet costs involved with frequent blood work and urinalysis should also be taken into consideration.

What can be mistaken for Addison's disease in dogs?

It is common for Addisonian dogs to be misdiagnosed as having kidney disease at first. Because the onset of Addison's disease usually happens around two to three years of age, veterinarians should always have it in mind as a possibility in any young dog that has blood work suggestive of kidney problems.

Are dogs in pain with Addison's disease?

Symptoms of Addison's Disease are many — increased thirst and urination, vomiting, diarrhea, weakness, no appetite, shaking or shivering, abdominal pain, weak pulse, slow heart rate. Once diagnosed, dogs with Addison's Disease must receive hormone therapy for life.

What can mimic Addison's?

The diagnosis may be delayed if the clinical presentation mimics a gastrointestinal disorder or psychiatric illness. We report a case of Addison's disease presenting as acute pain in abdomen mimicking clinical presentation of acute pancreatitis.

What is Stage 1 Addison's disease?

Addison's disease stages

Stage 1: You may have increased plasma renin with normal or low levels of aldosterone but no other abnormal results. Stage 2: You're likely to have high renin levels and low aldosterone levels. Renin is an enzyme produced in your kidney. It helps regulate your blood pressure.

What dog breeds are prone to Addison's?

While any dog can get Addison's disease, certain breeds have a higher genetic predisposition, including Bearded Collies, Standard Poodles, Great Danes, Nova Scotia Duck Tolling Retrievers, Portuguese Water Dogs, and West Highland White Terriers, with Rottweilers, Soft Coated Wheaten Terriers, and Leonbergers also being overrepresented. It's an endocrine disorder where adrenal glands don't produce enough hormones, often striking young to middle-aged female dogs.
 

What age do dogs get Addison's disease?

Addison's disease afflicts more female dogs than male dogs, with between 64% and 70% of reported cases being female. The average age at presentation is 4 years although there is a wide reported age range (4 months to 14 years). There are several overrepresented breeds with HOAC, some with genetic predisposition.

---