2018 ACVIM Forum Research Abstract Program: Seattle, Washington, June 14 - 15, 2018

Urine pH (p = 0.4), RSS for struvite (p = 0.6) and RSS for calcium oxalate (p = 0.3) were not significantly different between foods. Urine from cats fed the low sodium food had a significantly (p < 0.01) greater urine specific gravity ((mean±SEM) 1.054 ± 0.001 vs 1.038 ± 0.002), phosphorus (2776 ± 94 ppm vs 1370 ± 102 ppm) and citrate concentration (2993 ± 538 umol/L vs 1154 ± 589 umol/L) and significantly lower calcium (45 ± 7 ppm vs 80 ± 8 ppm) and COT (28 ± 30 vs 202 ± 33) compared to the high sodium food. Compared to the high sodium food, the low sodium food improved urinary crystallization capacity as measured by the COT test by 86% and lowered urine calcium concentration by 44%. With respect to calcium oxalate crystal formation, factors associated with increased urine stability, include urine citrate and urine phosphorus and these were significantly increased by 159% and 103% respectively.