Staging Kidney Disease in Cats

• Grade 1 creatinine <1.6
  
• Grade 2 creatinine 1.6 to 2.9 (Increased drinking and urination)
• Grade 3 creatinine 2.9 to 5.0 (Systemic signs such as bone pain, gastritis, and anemia)
  
• Grade 4 creatinine >5.0 (Increased severity of systemic signs and uremic crisis)