Table 2.
Percentage of dissected keel bones with/without several damages in hens of the first generation.
| Trait | Floor Housing | Single Cages | ||||||
|---|---|---|---|---|---|---|---|---|
| BLA | L68 | WLA | R11 | BLA | L68 | WLA | R11 | |
| n = 71 | n = 79 | n = 73 | n = 95 | n = 64 | n = 65 | n = 66 | n = 70 | |
| Percentage of keel bones with/without deformities 1 | ||||||||
| Score 4 | 70.42 | 82.28 | 41.10 | 47.37 | 15.63 | 61.54 | 3.03 | 2.86 |
| Score 3 | 23.94 | 15.19 | 38.36 | 47.37 | 26.56 | 33.85 | 6.06 | 24.29 |
| Score 2 | 5.63 | 2.53 | 20.55 | 5.26 | 57.81 | 4.62 | 90.91 | 72.86 |
| Significance | AB | A | D | C | E | BC | F | G |
| Direction of keel bone deformity 2 | ||||||||
| Score 0 | 0 | 0 | 0 | 1.96 | 0 | 0 | 0 | 1.49 |
| Score 1 | 85.71 | 86.67 | 65.12 | 82.35 | 16.67 | 76.00 | 4.69 | 10.45 |
| Score 2 | 14.29 | 13.33 | 34.88 | 15.69 | 83.33 | 24.00 | 95.31 | 88.06 |
| Significance | A | A | A | A | B | A | C | BC |
| Percentage of keel bones with/without fractures 3 | ||||||||
| Score 0 | 33.80 | 75.64 | 27.40 | 71.28 | 62.50 | 95.38 | 53.03 | 72.86 |
| Score 1 | 66.20 | 24.36 | 72.60 | 28.72 | 37.50 | 4.62 | 46.97 | 27.14 |
| Significance | B | E | A | E | DE | F | CD | E |
| Percentage of numbers of fractures in the caudal third of fractured keel bones | ||||||||
| 1 | 37.78 | 52.94 | 43.64 | 53.85 | 60.00 | 66.67 | 56.00 | 62.50 |
| 2 | 31.11 | 11.67 | 25.45 | 34.62 | 25.00 | 0 | 16.00 | 25.00 |
| 3 | 17.78 | 23.53 | 12.73 | 11.54 | 5.00 | 33.33 | 20.00 | 12.50 |
| ≥4 | 13.33 | 11.76 | 18.18 | 0 | 10.00 | 0 | 8.00 | 0 |
| Significance | A | A | A | A | A | A | A | A |
1 Scoring system: 4 = no deformity, 3 = slight deformity, 2 = moderate to severe deformity. 2 Scoring system: 0 = sagittal, 1 = transverse, 2 = sagittal and transverse. 3 Scoring system: 0 = fracture absent, 1 = fracture present. A–G: Overall frequencies within a row with no common letter differ significantly at p < 0.05.