Feather Pecking in Non-Beak-Trimmed and Beak-Trimmed Laying Hens on Commercial Farms with Aviaries
Abstract
:Simple Summary
Abstract
1. Introduction
2. Materials and Methods
2.1. Animals and Farms
2.2. Video Observation
2.3. Video Analyses
2.4. Statistics
3. Results
3.1. Occurrence and Influencing Factors of Severe Feather Pecking on Flock Level
3.2. Severe Feather Pecking in the Different Hybrid Lines and Functional Areas
3.3. Correlation of Aggressive Pecking and Severe Feather Pecking
3.4. Effect of Beak Trimming on the Occurrence of Aggressive Pecking and Severe Feather Pecking
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Flock | Additional Space | Hatch Date (DD.MM.YYYY) | OP 1: Week of Life | Hybrid Line(s) | Flock Size NBT(BT) | Number of Hens Per Square Meter Usable Area | Number of Hens Per Square Meter Nest | Camera Positions | Daylight/Artificial Light Type/Color |
---|---|---|---|---|---|---|---|---|---|
1 | n.a. | 26.03.2012 | OP 1: 29–31 OP 2: 44–46 OP 3: 64–66 | DW (85%) BB (15%) | 3589 (3665) | 9.4 | 108 | 2× perch, 2× litter area, 2× nest | No/HFFLT/white |
2 | n.a. | 06.10.2011 | OP 1: 29–31 OP 2: 46–48 OP 3: 64–68 | LB | 4250 | 8.5 | 92 | 3× perch, 3× litter area, 2× nest | Yes/HFFLT, LED/white |
3 | Free range + winter garden | 27.01.2012 | OP 1: 29–31 OP 2: 43–45 OP 3: 64–66 | LB | 4212 | 6.7 | 117 | 2× perch, 2× litter area, 2× nest, 1× winter garden | Yes/HFFLT, lightbulb, LED/white |
4 | Free range + winter garden | 04.05.2012 | OP 1: 31–33 OP 2: 42–44 OP 3: 63–65 | LB (50%) DW (50%) | 1450 | 8.9 | 79 | 2× perch, 2× litter area, 2× nest, 1× winter garden | Yes/LED/white |
5 | Free range | 20.02.2012 | OP 1: 30–32 OP 2: 46–48 OP 3: 64–66 | LB (50%) LSL (50%) | 2004 | 8.5 | 116 | 2× perch, 3× litter area, 2× nest | Yes/lightbulbs/yellow |
6 | Free range + winter garden | 31.12.2011 | OP 1: 28–30 OP 2: 44–46 OP 3: 64–68 | LB (75%) LSL (25%) | 2000 | 7.5 | 104 | 2× perch, 2× litter area, 2× nest, 1× winter garden | Yes/HFFLT, lightbulbs/white |
7 | n.a. | 31.12.2011 | OP 1: 29–31 OP 2: 44–46 OP 3: 63–65 | LB | 4500 (5000) | 7.8 | 98 | 2× perch, 2× litter area, 2× nest | No/HFFLT, lightbulbs/white, yellow |
8 | winter garden | 14.01.2012 | OP 1: 29–31 OP 2: 44–46 OP 3: 64–66 | LB (50%) LSL (50%) | 1481 | 8.6 | 110 | 2× perch, 2× litter area, 2× nest, 1× winter garden | Yes/HFFLT, lightbulbs/white |
Behavior of the Actor | Definition |
---|---|
Aggressive pecking | Forceful pecking, normally upward-down directed towards the head. Associated with a strong reaction of the receiver (flight, flirt or fight). |
Severe feather pecking | Violent pecking directed towards the plumage or bald skin areas. Visible plucking of one or more feathers and/or avoiding or aggressive reaction of the receiver. |
Layer Line | Comparison | OP 1 | OP 2 | OP 3 | Mean Value |
---|---|---|---|---|---|
LB (n = 45) | General | p = 0.006 ** | p < 0.001 *** | p = 0.001 *** | p < 0.001 *** |
Pairwise | P < L ** (p = 0.004) P < N (n.s.) L > N (n.s.) | P < L *** (p = 0.001) P < N (n.s.) L > N ** (p = 0.009) | P < L *** (p < 0.001) P < N (n.s.) L > N (n.s.) | P < L *** (p < 0.001) P < N (n.s.) L > N * (p = 0.037) | |
LSL (n = 19) | General | p = 0.003 ** | p = 0.002 ** | p = 0.001 ** | p = 0.001 ** |
Pairwise | P < L ** (p = 0.002) P < N (n.s.) L > N (n.s.) | P < L ** (p = 0.002) P < N (n.s.) L > N (n.s.) | P < L *** (p = 0.001) P < N (n.s.) L > N (n.s.) | P < L *** (p < 0.001) P < N (n.s.) L > N (n.s.) | |
DW (n = 12) | General | p = 0.007 ** | p = 0.094 (n.s.) | p = 0.055 (n.s.) | p = 0.012 * |
Pairwise | P < L ** (p = 0.005) P < N (n.s.) L > N (n.s.) | Not applicable | Not applicable | P < L * (p = 0.010) P < N (n.s.) L > N (n.s.) | |
BB (n = 6) | General | p = 0.123 (n.s.) | p = 0.165 (n.s.) | p = 0.091 (n.s.) | p = 0.165 (n.s.) |
Layer Line | Comparison | OP 1 | OP 2 | OP 3 | Mean Value |
---|---|---|---|---|---|
LB (n = 45) | General | p < 0.001 *** | p < 0.001 *** | p < 0.001 *** | p < 0.001 *** |
Pairwise | P < L *** (p < 0.001) P < N *** (p < 0.001) L > N (n.s.) | P < L *** (p < 0.001) P < N *** (p < 0.001) L < N (n.s.) | P < L *** (p < 0.001) P < N *** (p < 0.001) L < N (n.s.) | P < L *** (p < 0.001) P < N *** (p < 0.001) L < N (n.s.) | |
LSL (n = 19) | General | p = 0.003 ** | p = 0.001 *** | p = 0.003 ** | p = 0.003 ** |
Pairwise | P < L * (p = 0.010) P < N ** (p = 0.007) L < N (n.s.) | P < L * (p = 0.038) P < N *** (p = 0.001) L < N (n.s.) | P < L ** (p = 0.006) P < N * (p = 0.012) L < N (n.s.) | P < L ** (p = 0.005) P < N * (p = 0.014) L < N (n.s.) | |
DW (n = 12) | General | p = 0.024 * | p = 0.023 * | p = 0.024 * | p = 0.018 * |
Pairwise | P < L (n.s.) P < N * (p = 0.043) L > N (n.s.) | P < L (n.s.) P < N * (p = 0.032) L > N (n.s.) | P < L (n.s.) P < N * (p = 0.043) L > N (n.s.) | P < L (n.s.) P < N * (p = 0.018) L > N (n.s.) | |
BB (n = 6) | General | p = 0.156 (n.s.) | p = 0.123 (n.s.) | p = 0.095 (n.s.) | p = 0.180 (n.s.) |
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Schwarzer, A.; Plattner, C.; Bergmann, S.; Rauch, E.; Erhard, M.; Reese, S.; Louton, H. Feather Pecking in Non-Beak-Trimmed and Beak-Trimmed Laying Hens on Commercial Farms with Aviaries. Animals 2021, 11, 3085. https://doi.org/10.3390/ani11113085
Schwarzer A, Plattner C, Bergmann S, Rauch E, Erhard M, Reese S, Louton H. Feather Pecking in Non-Beak-Trimmed and Beak-Trimmed Laying Hens on Commercial Farms with Aviaries. Animals. 2021; 11(11):3085. https://doi.org/10.3390/ani11113085
Chicago/Turabian StyleSchwarzer, Angela, Christina Plattner, Shana Bergmann, Elke Rauch, Michael Erhard, Sven Reese, and Helen Louton. 2021. "Feather Pecking in Non-Beak-Trimmed and Beak-Trimmed Laying Hens on Commercial Farms with Aviaries" Animals 11, no. 11: 3085. https://doi.org/10.3390/ani11113085