Results 351 to 360 of about 818,236 (379)

Cecal Spirochetosis in Commercial Laying Hens

Avian Diseases, 1994
Cecal spirochetosis in chickens has been associated with enteric disease and reduced egg production in the United States and Europe. This report describes spirochete overgrowth of cecal mucosa in chickens from a flock of 100,000 commercial layers experiencing diarrhea and a 5% drop in egg production.
D W, Trampel, N S, Jensen, L J, Hoffman
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Optimum threonine requirement of laying hens

British Poultry Science, 1991
1. One experiment was conducted with medium weight laying hens to determine their threonine requirement between 28-38 weeks. 2. Two threonine-limiting diets of identical protein quality (summit-dilution) were used and, by dilution, ten protein contents were produced supplying 2.7 to 5.4 g total threonine/kg diet.
G, Huyghebaert, E A, Butler
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Pathogenesis of Fowlpox in Laying Hens

Avian Diseases, 1978
Egg production dropped after hens were inoculated with fowlpox virus originally isolated from a natural mild infection. The drop started from the 2nd week and continued to the 5th week after inoculation. All birds developed focal lesions at the site of inoculation, and some developed secondary lesions.
D N, Tripathy, L E, Hanson
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Copper Deficiency in the Laying Hen

The Journal of Nutrition, 1978
Copper deficiency in the laying hen resulted in anemia and the production of eggs which were abnormal in size and shape. Many of the eggs had shells which were wrinkled and rough in texture. There was also an increase in the number of shell-less eggs.
S, Baumgartner, D J, Brown, E, Salevsky, R M, Leach   +3 more
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Calcium Logistics in the Laying Hen

The Journal of Nutrition, 1987
The hourly changes in the Ca2+ content of various physiological compartments in relation to shell formation has been calculated for the domestic hen throughout a 4-d ovulatory sequence. These calculations consider the circadian rhythm in Ca2+ intake when the hen is fed a complete feed or a diet containing oyster shell, the effect of the stage of the ...
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Cannibalism in laying hens

Veterinary Record, 1992
P E, Curtis, N W, Marsh
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The laying hen and bone fractures

Veterinary Record, 2011
THE laying hen has undergone considerable artificial selection pressure over the past century, to increase its egg output in order to provide a protein-rich food source for humans. While its wild counterpart will lay just five to six eggs per breeding season, modern breeds will lay in excess of 300 eggs per year (Lever 2011). With increased egg output,
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Vitamin e hypervitaminosis in laying hens

Archiv für Tierernaehrung, 1999
The aim of this investigation was to contribute to the problem of overdosing vitamin E. A total of 80 laying hens, divided into 5 groups, were fed diets supplemented with 0, 100, 1000, 10,000 and 20,000 mg/kg vitamin E over a period of 20 weeks within two brooding tests. Laying performance and hatching parameters were registered.
A, Sünder, I, Halle, G, Flachowsky
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Play in Laying Hens

Dataset for the manuscript 'Fowl play: Do age and aviary design affect play in cage-free laying hens?' Authors: Xiaowen Ma (马晓文), Vrinda Ambike, Valentina Bongiorno, Jacquelyn A. Jacobs, Janice C. Swanson, Tina M. Widowski, Janice M. Siegford The project examined play behavior in cage-free laying hens focusing on effects of age (17-32 weeks of age ...
Ma, Xiaowen, Siegford, Janice
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Corticosteroids in Laying Hens

1980
In the literature adrenal hormones have often been related to stress and sometimes equalised as stress hormones.
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