Results 1 to 10 of about 128,209 (338)

Progesterone in the Blood of the Laying Hen [PDF]

Nature, 1958
FRAPS et al. 1, using the bioassay method of Hooker and Forbes2, reported progestational activity in the peripheral blood of the hen. Layne et al. 3, using chromatographic procedures, failed to find progesterone in chicken blood although they did identify this substance in extracts of ovarian tissue. In preliminary studies in this laboratory4, chemical
Ivan M. Lytle, F.W. Lorenz
openalex   +4 more sources

Effect of fermented laying hen manure and starter feed as growing media on black soldier fly larvae development [PDF]

BIO Web of Conferences, 2023
This study aimed to evaluate the development of Black Soldier Fly (BSF) larvae when reared on different feeding media, specifically using varying ratios of fermented laying hen manure and starter feed.
Wiyoso Shelfia Anggraini, Sulistyo Hanief Eko, Andri Faizal, Isnaini Nurul   +3 more
doaj   +3 more sources

Iron metabolism in the laying hen [PDF]

Biochemical Journal, 1954
W. N. M. Ramsay, Elizabeth A. Campbell
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Welfare of laying hens on farm [PDF]

EFSA Journal, 2023
This scientific opinion focuses on the welfare of laying hens, pullets and layer breeders on farm. The most relevant husbandry systems used in Europe are described. For each system, highly relevant welfare consequences were identified, as well as related animal-based measures (ABMs), and hazards leading to the welfare consequences.
EFSA Panel on Animal Health and Animal Welfare,, Nielsen, Søren Saxmose, Alvarez, Julio, Bicout, Dominique Joseph, Calistri, Paolo, Canali, Elisabetta, Drewe, Julian Ashley, Garin-Bastuji, Bruno, Gonzales Rojas, Jose Luis, Gortázar Schmidt, Christian, Herskin, Mette, Miranda Chueca, Miguel Ángel, Padalino, Barbara, Pasquali, Paolo, Roberts, Helen Clare, Spoolder, Hans, Stahl, Karl, Velarde, Antonio, Viltrop, Arvo, Winckler, Christoph, Estevez, Inmaculada, Guinebretière, Maryse, Rodenburg, Bas, Schrader, Lars, Tiemann, Inga, Van Niekerk, Thea, Ardizzone, Michele, Ashe, Sean, Hempen, Michaela, Mosbach-Schulz, Olaf, Rojo Gimeno, Cristina, Van der Stede, Yves, Vitali, Marika, Michel, Virginie   +33 more
openaire   +8 more sources

The effect of space allowance in the cage and floor systems on feather condition and egg production [PDF]

Biotechnology in Animal Husbandry, 2022
The egg production sector is in a transitional period with regard to the permitted housing systems, i.e. rearing in conventional cages under certain conditions to the complete ban of any form of cage system.
Škrbić Zdenka, Lukić Miloš, Petričević Veselin, Bogosavljević-Bošković Snežana, Rakonjac Simeon, Dosković Vladimir, Tolimir Nataša   +6 more
doaj   +1 more source

The Effect of Hard Pecking Enrichment during Rear on Feather Cover, Feather Pecking Behaviour and Beak Length in Beak-Trimmed and Intact-Beak Laying Hen Pullets

Animals, 2022
Injurious pecking, commonly controlled by beak trimming (BT), is a widespread issue in laying hens associated with thwarted foraging. This controlled study compared the effect in intact and beak-trimmed pullets of providing pecking pans to eight ...
Paula Elizabeth Baker, Christine Janet Nicol, Claire Alexandra Weeks   +2 more
doaj   +1 more source

Soybean oil addition to wheat bran-based diet improves laying hens’ performance [PDF]

Veterinary World, 2023
Background and Aim: Wheat bran (WB) is used extensively in animal feed. Despite its nutritional value, its use is limited because of its high-fiber content.
Mariana Novela, Sónia Carlitos Pinto, Angélica Tembe, Emmanuel Paulo, Marcos Mabasso, Albino Gove, Abilio Paulo Changule, Leonel António Joaquim, Ramos Tseu, Filomena dos Anjos, Custódio Gabriel Bila   +10 more
doaj   +1 more source

The Ethics of Laying Hen Genetics [PDF]

Journal of Agricultural and Environmental Ethics, 2019
AbstractDespite societal concerns about the welfare of commercial laying hens, little attention has been paid to the welfare implications of the choices made by the genetics companies involved with their breeding. These choices regarding trait selection and other aspects of breeding significantly affect living conditions for the more than 7 billion ...
Mia Fernyhough, Christine J. Nicol, Teun van de Braak, Michael J. Toscano, Morten Tønnessen   +4 more
openaire   +5 more sources

Environmental Enrichments in Laying Hen Production Systems with Emphasis on Welfare and Egg Quality

Turkish Journal of Agriculture: Food Science and Technology, 2021
To improve hen welfare, several studies have investigated various environmental enrichments that suit different laying hen production systems. The positive results of these studies can enable such environmental enrichments to be utilized in commercial ...
Brian Tainika, Ahmet Şekeroğlu
doaj   +1 more source

Inventory of biosecurity measures and antibiotics therapy practices on laying hen farms in Benin [PDF]

Veterinary World, 2020
Background and Aim: Laying hen breeding is on the rise in Benin; nevertheless, there are several sanitary constraints to its development, including bacterial diseases. Faced with this situation, breeders mainly resort to different means of treatment. The
Oscar N. C. Aguidissou, Cyrille K. Boko, Camus M. Adoligbe, Clarisse H. Dete, Picole T. Capo-Chichi, Yao Akpo, Benoit G. Koutinhouin, Souaïbou Farougou   +7 more
doaj   +1 more source