One cat had mild azotaemia (creatinine 224 μmol/l; reference interval [RI] 53–141) at presentation, which had resolved when tested the next day; one cat had a mild to moderate increase in alanine aminotransferase (ALT 6.5 μkat/l; RI 0–2), where the owner declined follow-up; two cats had mild hypoglycaemia (3.3 mmol/l and 3.8 mmol/l, respectively; RI 3.9–6.7); five cats had mild hypokalaemia (2.6–3.0 mmol/l; RI 3.1–4.0); and three cats had mild hyperkalaemia (4.2–4.4 mmol/l). Here, GPT is linked to Hypokalemia.