Kaplan Meier curves plotting the proportion of dogs in each treatment group that had not met the clinical endpoint of urinary‐protein‐to‐creatinine ratio (UPC) reduction ≥50% (A and C), or UPC ≤0.5 (B and D) over time. Dogs were treated with enalapril (0.5‐1.5 mg/kg PO q12h) or telmisartan (1‐3 mg/kg PO q24h) monotherapy during study days 0‐90, with or without the second drug during study days 91‐120. UPC was measured every 30 days until UPC ≤0.5 was achieved, and study drug dosages were increased every 30 days to target UPC ≤0.5. At day 90, dogs with UPC > 0.5 on “ceiling” dosages of either medication alone were treated with combination therapy. Vertical hashes represent dogs censored from analysis. A and B, Data from dogs grouped according to identity of the initial study drug. C and D, Data from dogs grouped according to study drug protocol administered for the 30 days preceding final study recheck (ie, enalapril or telmisartan monotherapy, the combination of 1.5 mg/kg enalapril PO q12h + 1.0 mg/kg telmisartan PO q24h, or the combination of 3 mg/kg telmisartan PO q24h + 0.5 mg/kg enalapril PO q12h)