Adrenal Disorders in Pigs: Cortisol and Adrenal Hormone Problems

Adrenal disorders in pigs are problems involving the adrenal glands, which sit near the kidneys and make hormones such as cortisol and aldosterone. These hormones help control stress response, metabolism, immune function, blood pressure, and salt-water balance. When the glands make too much hormone, too little hormone, or develop a mass, a pig can become sick in ways that are often gradual and easy to miss at first.

In veterinary medicine, excess cortisol is broadly grouped under hyperadrenocorticism or Cushing syndrome. Merck Veterinary Manual describes this as a disorder caused by persistently elevated cortisol, most often from a pituitary tumor driving the adrenal glands or from an adrenal tumor itself. Those patterns are well described across animals, but they are considered uncommon in pigs, especially pet pigs, so diagnosis often requires ruling out more common problems first.

Because adrenal disease is rare in pigs, many signs overlap with other conditions such as obesity, poor diet, chronic stress, reproductive disease, infection, liver disease, or medication effects. That means a pig with suspected adrenal hormone trouble needs a careful workup rather than assumptions. Your vet will look at the whole picture, including age, body condition, medications, environment, and whether signs came on slowly or suddenly.

The main adrenal hormone problems vets think about are too much cortisol, too little adrenal hormone production, and adrenal masses. In animals generally, Merck notes that excess cortisol most often comes from a pituitary tumor that overstimulates the adrenal glands or from an adrenal tumor that produces cortisol on its own. Long-term steroid medication can also create an iatrogenic, or medication-related, cortisol excess picture.

In pigs, true naturally occurring adrenal disease appears to be rare compared with dogs and ferrets. That matters because common look-alikes are often more likely. Obesity, high-calorie diets, chronic illness, liver disease, reproductive tract disease, skin disease, and stress-related changes can mimic parts of an adrenal disorder.

Low adrenal hormone production, similar to hypoadrenocorticism in other species, may cause weakness, dehydration, low blood pressure, electrolyte changes, and collapse. However, because published pig-specific guidance is limited, your vet may need to use a combination of pig medicine, general endocrine principles, and referral input from an exotics or livestock-focused veterinarian to decide what is most likely in your pig.

Diagnosis usually starts with basics, not specialty hormone testing. Your vet will begin with a physical exam, body condition assessment, medication history, and questions about thirst, urination, appetite, activity, and recent stressors. Bloodwork and urinalysis help look for patterns that can fit adrenal disease, while also checking for more common causes of similar signs.

Merck describes diagnosis of cortisol excess in animals as a combination of history, physical examination, clinicopathologic testing, endocrine testing, and diagnostic imaging. In a pig, that often means a CBC, chemistry panel, electrolytes, urinalysis, and abdominal ultrasound to look at the adrenal glands and nearby organs. Blood pressure measurement may also be helpful.

If your vet still suspects an adrenal hormone disorder after the initial workup, they may discuss endocrine testing or referral. Tests such as ACTH stimulation are widely used in other species, but interpretation in pigs can be less straightforward because pig-specific reference data are limited in everyday practice. That is one reason referral to an experienced exotics, internal medicine, or university service can be especially valuable.

Not every adrenal disorder can be prevented, especially if a tumor is involved. Still, good routine care can lower the chance of missing early changes and can reduce other problems that mimic endocrine disease. Regular wellness visits, weight checks, and prompt evaluation of increased thirst, weakness, or belly enlargement give your vet a better chance to catch illness before it becomes severe.

Avoid giving steroids unless your vet specifically prescribes them and explains the plan. In other species, long-term steroid exposure can create signs similar to naturally occurring cortisol excess, so medication history matters. Keep a record of any injections, oral medications, or topical products your pig receives.

Daily management also matters. Feed a balanced pig-appropriate diet, prevent obesity, provide clean water at all times, and reduce chronic stress from overcrowding, poor footing, heat, or social conflict. These steps do not guarantee prevention of adrenal disease, but they support overall endocrine health and make it easier for your vet to spot meaningful changes early.