A nine year-old miniature schnauzer is presented with signs of diabetes mellitus and severe cranial abdominal pain Echography associated with an echoguided punction enables a diagnosis of hepatic abscess. Hepatic abscesses have a poor prognosis. However, a broad spectrum antibiotherapy associating bactericidal antibiotics and a surgical drainage can be considered The immunosuppression caused by the diabetes mellitus favours infections, and in the present case, the development of an hepatic absces. In parallel, the infections cause an insulinoresistence which complicates the treatment of the diabetic patient. Efficiency antibiotherapy is essential in such cases to stabilise the diabetes (4 photos, 2 figures, 3 tables, 2 boxes, 14 references).