Diabetes mellitus was present in 29 cats (39.7%), suspected hepatopathy in 22 cats (30.1%; ALT [median (range)] – 307 (58–2322) U/L; TB – 18.8 (6.8–359.1) μmol/L), suspected acute kidney injury in 7 cats (9.6%; urea – 29.0 (17.9–62.7) mmol/L, creatinine – 353.6 (256.4–1246) μmol/L), and neoplastic disease in 3 cats (4.1%) (malignant liver tumor, intestinal lymphoma, and disseminated pulmonary metastases from the mammary gland tumor). The gene discussed is GPT; the disease is Decreased liver function.