LCN2 and acute kidney injury: Urine NGAL (uNGAL) is an early diagnostic marker for AKI in dogs that correctly detects non‐azotaemic AKI (IRIS grade I AKI) in both experimentally induced kidney injury [26, 27, 28, 29, 30, 31, 32] and clinical cases [15, 33, 34, 35, 36].