Ferret Adrenal Disease

What is Adrenal Disease

Ferret adrenal disease, also called hyperadrenocorticism, is one of the most common medical conditions affecting pet ferrets. In the United States, up to 70 percent of ferrets develop adrenal disease during their lifetime.

The adrenal glands are two small organs located near the kidneys. They normally produce hormones that regulate many body functions. In ferrets with adrenal disease, one or both adrenal glands become enlarged due to:

• Hyperplasia (overgrowth of the gland)
• A benign tumor
• A malignant tumor

Unlike Cushing’s disease in dogs, adrenal disease in ferrets is caused by excess sex hormones (androgens) rather than excess natural steroids. The disease is most often diagnosed in ferrets three years of age or older, but it can occur as early as two years of age.

Clinical signs

Signs of adrenal disease are related to elevated hormone levels and may include:

• Progressive hair loss, often starting at the tail or hips
• Itching (pruritus)
• Enlarged vulva in females
• Enlarged prostate in males, leading to straining or difficulty urinating
• Increased sexual behaviors or aggression
• Lethargy
• Weight loss
• Hind limb weakness

If left untreated, some of these signs can become life threatening, especially urinary obstruction in male ferrets.

Diagnosis

Diagnosis is based on a combination of:

• A thorough medical history
• Complete physical examination
• Basic blood work
• Hormone testing (endocrine panel submitted to the University of Tennessee)
• Imaging such as X-rays, ultrasound, or CT scan

Not all tests are required for every ferret. Your veterinarian will recommend diagnostics based on your ferret’s age, symptoms, and overall health.

Treatment options

The best treatment for adrenal disease depends on several factors, including your ferret’s age, overall health, and whether one or both adrenal glands are affected.

Surgical treatment

Surgery involves removing the affected adrenal gland.

• If only one gland is affected, surgery can be curative
• The left adrenal gland is generally easier to remove
• The right adrenal gland is more difficult due to its close association with the caudal vena cava

In some ferrets, both adrenal glands are affected. Because adrenal glands play an important role in normal body function, removing both glands completely is not possible and can lead to serious complications.

Medical treatment

Medical management is now the most common approach to treating adrenal disease due to lower risk and cost compared to surgery. Medical therapy controls hormone production but does not remove adrenal tumors.

Medical treatment may include one or more of the following:

Deslorelin

Deslorelin is a hormone analog that slowly suppresses adrenal stimulation and hormone release. It is administered as a small implant injected under the skin.

• Symptoms typically improve within two to six weeks
• Effects last eight to twenty months
• Often recommended yearly for symptomatic ferrets
• Use as a preventive treatment in young ferrets is currently being studied

Leuprolide

Leuprolide works similarly to deslorelin but requires:

• Monthly injections, or
• Quarterly injections, depending on formulation

Melatonin

Melatonin supplementation may help counteract the effects of artificial lighting, especially during long summer days.

• A long-acting implant can be placed under the skin every six months

Prostate-directed medications (males)

For ferrets with enlarged prostates causing discomfort or urinary issues:

• Flutamide
• Bicalutamide
• Finasteride

These medications can help reduce prostate size and improve quality of life.

Anastrozole

Anastrozole may be used to reduce excess estrogen levels associated with adrenal disease.

Preventing adrenal disease with annual exams

Recent research suggests that annual preventive treatments can significantly reduce the risk of adrenal disease in ferrets.

We strongly recommend:

• Annual ferret examinations every January
• Preventive hormone therapy when appropriate. Standard Process makes supplements like Canine Adrenal Support, Symplex M and Symplex F, Utrophine PMG and Orchic PMG which may be beneficial when started early.
• Early detection of subtle changes before serious complications develop

Regular exams allow us to keep your ferret healthy, comfortable, and thriving for as long as possible.

When to call us

Contact us promptly if your ferret shows:

• Hair loss
• Changes in urination
• Behavioral changes
• Lethargy or weakness
• Weight loss

Early intervention leads to better outcomes and fewer complications.

If you have questions or concerns about adrenal disease or preventive care for your ferret, please contact the hospital at (603) 882-0494. We are here to help guide you through every stage of your ferret’s life.