Table 2. Treatment arrangement
| Treatment | Density (birds/m2) | Total area (m2) | Group size (birds/pen) |
| T1 | 4 | 5.521 | 22 |
| T2 | 5 | 27 |
| T3 | 6 | 33 |
| T4 | 7 | 38 |
| T5 | 8 | 44 |
| T6 | 9 | 49 |
3.4 m × 2 m = 6.8 m2, 6.8 m2 − 2 × (0.8 m × 0.8 m) = 6.8 m2 − 1.28 m2 = 5.52 m2, 0.8 m: feeder diameter.