Figure 1.

Fecal pH and concentrations of ammonia and total biogenic amines in dogs fed a lower protein and fiber diet (day 21) transitioned to a higher protein and fiber diet (days 23 to 49) without (control) or with (probiotic) yeast supplementation (S). ^a,b,c Different superscript letters near control and probiotic groups for ammonia and total biogenic amines indicate differences among days by the LSD Bonferroni test in each group (p < 0.05). When p > 0.05 for interaction, the letters indicate difference for day for both groups (fecal pH). * Indicates difference between control and probiotic groups at the time point.