CONDITION
Steroid Hepatopathy
Steroid hepatopathy is a pattern of change in the liver that can develop when a dog has been exposed to high levels of corticosteroid hormones over time. These hormones may come from medication given for another condition, or they may be produced in excess by the body itself. The liver responds to this sustained exposure by accumulating glycogen—a storage form of energy—within its cells, which alters how the organ works and appears on testing. Owners often arrive at this question after blood tests show elevated liver enzymes, sometimes during routine screening or investigation of another concern. The dog may seem well, or there may be subtle changes in thirst, appetite, weight distribution, or energy that have developed gradually. In some cases, the picture includes an enlarged abdomen or changes in coat quality. This page explores what signs may appear, what is happening at a cellular and hormonal level, how the pattern is investigated through blood work and imaging, and what approaches exist depending on the underlying cause and the degree of change. The aim is to help you understand the condition and the thinking behind different paths forward.
Why this matters now
Steroid hepatopathy can appear at any age, though middle-aged and older dogs are more commonly affected, reflecting both the cumulative use of corticosteroid medication for chronic conditions and the gradual development of hormone-producing tumours in the pituitary or adrenal glands. Certain breeds, including Poodles, Dachshunds, Terriers, and Boxers, appear to be more susceptible to the endogenous form—where the body itself produces excess cortisol. The condition tends to develop over weeks to months, rather than appearing suddenly, and may only become apparent when blood tests are performed for another reason or when physical changes accumulate enough to be noticed.
The changes in the liver typically develop gradually as hepatocytes continue to accumulate glycogen in response to sustained corticosteroid exposure. In some dogs, the pattern remains stable if the underlying cause is addressed or medication is adjusted, whilst in others the liver enlargement and enzyme elevation may progress, particularly if the hormonal exposure continues unchecked. The timeline and degree of change can vary considerably between individuals, influenced by the dose and duration of steroid exposure, the underlying cause, and how the individual liver responds to metabolic stress.
Signals & patterns
Early signals
Increased thirst and urination
Many owners notice their dog drinking more water than usual and needing to go outside more frequently, sometimes overnight. This pattern reflects the effect of corticosteroids on the kidneys and how the body regulates water balance.
Increased appetite
A dog may seem persistently hungry, seeking food more often or showing greater interest in meals and scraps. Corticosteroids influence appetite centres in the brain and alter how the body handles glucose and fat.
Gradual weight gain or redistribution
Some dogs gain weight despite no change in diet, or develop a rounder, heavier appearance around the abdomen whilst muscle mass over the limbs and spine may seem reduced. This reflects shifts in how the body stores and uses energy under the influence of cortisol.
Subtle lethargy or reduced stamina
A dog may tire more easily on walks, rest more during the day, or seem less enthusiastic about activities they previously enjoyed. Muscle weakness and metabolic changes can contribute to this shift in energy.
Changes in coat quality
The coat may become thinner, duller, or slower to regrow after clipping, and the skin may feel thinner or more fragile. Corticosteroids affect hair follicle cycling and collagen production in the skin.
Later signals
Enlarged, pendulous abdomen
The belly may appear distended or pot-bellied, often due to a combination of enlarged liver, weakened abdominal muscles, and redistribution of fat. This change tends to develop over weeks to months and can become quite pronounced.
Panting at rest
A dog may breathe more heavily or pant even when not warm or active, reflecting metabolic and respiratory changes associated with prolonged corticosteroid exposure and the increased workload on the body.
Recurrent skin or urinary infections
Some dogs develop repeated infections, as corticosteroids suppress aspects of the immune system and alter the skin's protective barrier. Owners may notice recurrent hot spots, skin irritation, or cloudy urine.
Muscle wasting over the head and limbs
Muscle mass may visibly diminish, particularly over the temples, shoulders, and thighs, even as the abdomen enlarges. This reflects the catabolic effect of excess cortisol on muscle tissue over time.
Click to read about the biological mechanisms
How this is usually investigated
Options & trade-offs
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