Chronic Hepatitis in Dogs

Chronic hepatitis in dogs describes ongoing inflammation in the liver that persists over weeks to months, gradually affecting how the liver works. The liver has a remarkable capacity to compensate, which means signs often emerge slowly and can be subtle at first — things like reduced appetite, occasional vomiting, increased thirst, or a general sense that a dog is not quite themselves. In some cases, jaundice (a yellowing of the gums or skin) appears, or fluid begins to accumulate in the abdomen. Owners often arrive at this page after blood tests have shown changes in liver enzymes, or because a dog has been losing weight or seems less energetic over time. The condition can have many underlying causes — some related to the immune system, some to copper accumulation, some to infections, and in many cases the cause remains unclear even after investigation. This page explores the signs that may be observed, what is happening in the liver tissue itself, how chronic hepatitis is investigated through blood work and imaging, and the range of approaches that exist to support liver function and address underlying causes where they can be identified.