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Stagea
1
2
3
4
Nonazotemic Kidney Disease
Mild Renal Azotemia
Moderate Renal Azotemia
Severe Renal Azotemia
Creatinine (mg/dL)
Dogs
<1.4
1.4–2.0
2.1–5.0
>5.0
Cats
<1.6
1.6–2.8
2.9–5.0
a Stages are as recommended by the International Renal Interest Society.