Feline obesity disease was diagnosed if overweight cats with BCS ≥7/9 demonstrate two or more of the following symptoms—hyperlipidemia (TG ≥180 mg/100 mL), high ALT activities (≥80 U/L), and high SAA concentrations (≥4.0 mg/L) (Table 3). The gene discussed is GPT; the disease is hyperlipidemia.