Table 4.
Metabolizable energy (ME, mean ± SD) of the study diets
| Measure* | Unit | Kibble (n = 12) |
Fresh C (n = 12) |
Fresh B (n = 6) |
Fresh P (n = 6) |
Fresh T (n = 6) |
P** |
|---|---|---|---|---|---|---|---|
| Calculated ME | kcal/g FW diet | 4.00±0.12a | 1.41±0.02b | 1.41±0.01b | 1.15±0.01c | 1.45±0.01d | 2.05E–07 |
| kcal/g DM diet | 4.23±0.13a | 5.19±0.06b | 4.98±0.05c | 4.37±0.03a | 5.01±0.02c | 2.31E–07 | |
| %ME/GE | 80.8±2.4a | 87.3±1.0b | 87.3±0.8b,d | 85.4±0.5c | 86.4±0.4d | 1.27E–06 | |
| Measured ME | kcal/g FW diet | 3.92±0.14a | 1.37±0.02b | 1.41±0.01c | 1.07±0.01d | 1.41±0.01c | 1.47E–07 |
| kcal/g DM diet | 4.14±0.15a | 5.07±0.07b | 4.95±0.05c | 4.07±0.02a | 4.88±0.03d | 3.22E–07 | |
| %ME/GE | 78.7±2.9a | 86.4±1.2b,c | 86.8±0.9b | 84.0±0.5d | 85.7±0.5c | 1.29E–06 | |
| Atwater ME | kcal/g FW diet | 4.25 | 1.40 | 1.40 | 1.15 | 1.45 | – |
| kcal/g DM diet | 4.49 | 5.17 | 4.94 | 4.34 | 4.99 | – | |
| %ME/GE | 85.9 | 87.1 | 86.7 | 84.9 | 86.1 | ||
| Modified Atwater ME | kcal/g FW diet | 3.83 | 1.28 | 1.27 | 1.03 | 1.31 | – |
| kcal/g DM diet | 4.05 | 4.72 | 4.49 | 3.89 | 4.53 | – | |
| %ME/GE | 77.4 | 79.4 | 78.7 | 76.1 | 78.3 | ||
| NRC 2006 ME (CF) | kcal/g FW diet | 3.90 | 1.32 | 1.34 | 1.09 | 1.39 | – |
| kcal/g DM diet | 4.12 | 4.88 | 4.73 | 4.14 | 4.78 | – | |
| %ME/GE | 78.8 | 82.2 | 82.9 | 80.9 | 82.6 | ||
| NRC 2006 ME (TDF) | kcal/g FW diet kcal/g DM diet |
3.79 | 1.14 | – | – | – | – |
| 4.01 | 4.21 | – | – | – | – | ||
| %ME/GE | 76.6 | 70.9 | – | – | – |
FW: fresh weight, DM: dry matter, GE: gross energy (of food intake), NRC: National Research Council, CF: crude fiber, TDF: total dietary fiber, fresh C: fresh chicken, fresh B: fresh beef, fresh P: fresh pork, fresh T: fresh turkey.
*Calculated ME is calculated from calculated gross energy. Measured ME is calculated from gross energy measured by the bomb calorimetry. Atwater, modified Atwater, and NRC 2006 ME calculations are described in Supplemental Table 1.
**Kruskal–Wallis rank sum test. Means not sharing the same superscript are significantly different (pairwise Wilcoxon rank sum tests with false discovery rate adjustment).