Results 291 to 300 of about 841,035 (344)

Suspected Mycotoxicosis in Laying Hens

Avian Diseases, 1985
A flock of 15,000 leghorn-type hens experienced a 10% drop in egg production. Enlarged, blue combs and diarrhea were also present. Clinical signs, postmortem and histopathological lesions, and response to therapy were compatible with a diagnosis of mycotoxin intoxication.
C L, Hofacre, R K, Page, O J, Fletcher
openaire   +2 more sources

The effect of including full-fat dried black soldier fly larvae in laying hen diet on egg quality and sensory characteristics

, 2020
Effects of including full-fat dried black soldier fly larvae (DBSFL) in laying hen diets on egg quality, fatty acid and metal compositions of the yolk, and the sensory characteristics of hard-boile...
M. Bejaei, K. M. Cheng
semanticscholar   +1 more source

The influence of light of different wavelengths on laying hen production and egg quality

, 2020
SUMMARY Worldwide, commercial laying hens are frequently being used for only one production cycle mainly due to a decline in egg quality and/or egg quantity at 70–80 weeks of age.
A. England, I. Ruhnke
semanticscholar   +1 more source

Fluoride tolerance of laying hens

British Poultry Science, 1997
1. One thousand Silver Grey Hyline hens were given drinking water containing 5 concentrations of added sodium fluoride (0, 6, 10, 14 and 20 mg/l) over a 17-week growth and 57-week laying period. The natural fluoride content of the water was 0.21 mg/l during the growing period and 0.29 mg/l throughout lay. 2. During the rearing phase, efficiency of food
C B, Coetzee, N H, Casey, J A, Meyer
openaire   +2 more sources

Causes of feather pecking and subsequent welfare issues for the laying hen: a review

, 2020
When feather-pecking behaviour by hens becomes repetitive, plumage damage often results for the recipient of the pecks. The forceful removal of feathers and vigorous pecks directed at the skin may also cause pain, fear and even wounds.
G. Cronin, P. Glatz
semanticscholar   +1 more source

Climatic adaptation of laying hens

Tropical Animal Health and Production, 1994
Three hundred Warren Isabrown female day old chicks were raised for 18 weeks in 3 distinct artificial climates described as temperate (20 degrees C, 60% RH), hot dry (32 degrees C, 40% RH) and hot humid (32 degrees C, 90% RH). At 18 weeks each group was divided into 3 and re-allocated to 3 similar air-conditioned laying rooms as during the growing ...
Njoya, J., Picard, M.
openaire   +3 more sources

Natural behaviours, their drivers and their implications for laying hen welfare

, 2020
Some believe that farm animals need to be kept in conditions that provide ‘natural’ aspects in the animal’s environment and, thus, provide the opportunity for the animals to perform their full ‘behavioural repertoire’.
P. Hemsworth, L. Edwards
semanticscholar   +1 more source

Laying hen’s mobility is impaired by keel bone fractures and does not improve with paracetamol treatment

Applied Animal Behaviour Science, 2019
Keel bone fractures (KBF) in laying hens pose a severe problem for animal welfare as they are likely to be associated with pain and suffering. Furthermore, they are suspected to hinder or restrict hens in their performance of natural species-specific ...
A. Rentsch, C. Rufener, C. Spadavecchia, A. Stratmann, M. Toscano   +4 more
semanticscholar   +1 more source

Perch width preferences of laying hens

British Poultry Science, 2009
1. In order to investigate the effect of perch width on perching behaviour of laying hens, two experiments in which hens could choose between 7 different perch widths (1.5, 3.0, 4.5, 6.0, 7.5, 9.0 and 10.5 cm) were conducted. In one experiment (EXP-2P) test cages contained two long perches gradually broadening and narrowing stepwise, in the other ...
E, Struelens, F A M, Tuyttens, B, Ampe, F, Odberg, B, Sonck, L, Duchateau   +5 more
openaire   +2 more sources

Hyperphosphataemia in histamine injected laying hens

Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1987
The effects of histamine on soluble calcium concentrations in gastrointestinal tract contents, acid secretion, urinary phosphorus excretion, plasma free-hydroxyproline and inorganic phosphorus levels were studied in laying hens during egg shell formation.
Cabrera-Saadoun, M.C., Nys, Yves, Sauveur, Bernard, Gautron, Joël   +3 more
openaire   +3 more sources