Prevalence of keel bone deformities in Swiss laying hens
| Autor: | S Käppeli, Sabine G. Gebhardt-Henrich, A. Pfulg, Michael Hubert Stoffel, Ernst K.F. Fröhlich |
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| Rok vydání: | 2011 |
| Předmět: |
Veterinary medicine
Perch Palpation biology Bone pathology technology industry and agriculture General Medicine biology.organism_classification Animal Welfare Housing Animal Bone and Bones Fractures Bone stomatognathic system Species Specificity Plumage Prevalence Animals Animal Science and Zoology Female Flock Keel (bird anatomy) Chickens Poultry Diseases Switzerland Food Science |
| Zdroj: | British poultry science. 52(5) |
| ISSN: | 1466-1799 |
| Popis: | The goal of this study was to evaluate the prevalence of keel bone deformities of laying hens in Switzerland. The keel bones of 100 end-of-lay hens from each of 39 flocks (3900 in total) were palpated. On average, 25·4% of the hens had moderately or severely deformed keel bones and the overall prevalence including slight deformities was 55%. 3. Variation between flocks was considerable. Thus, the prevalence of moderately or severely deformed keel bones ranged from 6 to 48%, and the overall prevalence including slight deformities ranged from 20 to 83%. Aviary housing was associated with a higher prevalence of total, and severe or moderate deformations, compared with floor pens. There were no significant differences in the number of deformities between the different plumage colours, hybrids or perch materials. |
| Databáze: | OpenAIRE |
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