|  |  |  |  |  |  | ANOVA P-value |  | ||
---|---|---|---|---|---|---|---|---|---|---|
 | LP HD | HP HD | HP LD | LP HD + FOS | HP HD + FOS | HP LD + FOS | Protein level | Protein digestibility | FOS | Pooled SEM |
At 6Â h | ||||||||||
 pH | 6.60 | 6.76 | 6.90 | 5.93 | 6.24 | 6.52 | <0.001 | <0.001 | <0.001 | 0.04 |
 NH3 | 37.3 | 37.8 | 36.0 | 33.6 | 35.2 | 35.1 | 0.238 | 0.281 | 0.002 | 0.89 |
At 24Â h | ||||||||||
 pH | 6.23 | 6.41 | 6.67 | 5.74 | 5.99 | 6.14 | <0.001 | <0.001 | <0.001 | 0.03 |
 NH3 | 40.3 | 41.6 | 39.2 | 36.0 | 37.8 | 35.6 | 0.023 | 0.002 | <0.001 | 0.64 |