This document provides HbA1c (A1c) range guidelines for canines and felines. It lists the normal, prediabetic, and diabetic A1c ranges for both dogs and cats, with normal dogs at 0-6%, prediabetic at 6-14%, and diabetic over 14%; and normal cats at 0-3.5%, prediabetic at 3.5-6%, and diabetic over 6%.