Cystatin C is a low-molecular-weight protein that serves as a superior endogenous marker for evaluating kidney function, with sensitivity exceeding that of creatinine. It reflects real-time glomerular filtration rate (GFR) and helps detect early kidney damage before traditional markers show abnormalities. Our Cystatin C Test Kits for dogs are designed for use in routine exams, early renal assessment, pre-surgical screening, and monitoring conditions such as diabetes or hyperthyroidism. Accurate and non-invasive, these kits support early intervention and proactive kidney care, making them an essential tool in maintaining long-term canine health.