scholarly journals Aerial perches and free-range laying hens: The effect of access to aerial perches and of individual bird parameters on keel bone injuries in commercial free-range laying hens

2012 ◽  
Vol 91 (2) ◽  
pp. 304-315 ◽  
Author(s):  
C.J. Donaldson ◽  
M.E.E. Ball ◽  
N.E. O'Connell
Keyword(s):  
Laying Hens ◽  
Free Range ◽  
Individual Bird

scholarly journals Early rearing enrichments influenced nest use and egg quality in free-range laying hens

animal ◽  
2020 ◽  
Vol 14 (6) ◽  
pp. 1249-1257 ◽  
Author(s):  
M.S. Bari ◽  
A.M. Cohen-Barnhouse ◽  
D.L.M. Campbell
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Free Range ◽  
Early Rearing

Flock use of the range is associated with the use of different components of a multi-tier aviary system in commercial free-range laying hens

2019 ◽  
Vol 61 (2) ◽  
pp. 97-106 ◽  
Author(s):  
T. Z. Sibanda ◽  
S. W. Walkden-Brown ◽  
M. Kolakshyapati ◽  
B. Dawson ◽  
D. Schneider ◽  
...  
Keyword(s):  
Laying Hens ◽  
Free Range

Panic in free-range laying hens

2012 ◽  
Vol 170 (20) ◽  
pp. 519.2-519 ◽  
Author(s):  
G. J. Richards ◽  
S. N. Brown ◽  
F. Booth ◽  
M. J. Toscano ◽  
L. J. Wilkins
Keyword(s):  
Laying Hens ◽  
Free Range

scholarly journals Evaluation of Quality of Eggs from Hens Kept in Caged and Free-Range Systems Using Traditional Methods and Ultra-Weak Luminescence

2019 ◽  
Vol 9 (12) ◽  
pp. 2430 ◽  
Author(s):  
Ilona Gałązka-Czarnecka ◽  
Ewa Korzeniewska ◽  
Andrzej Czarnecki ◽  
Michał Sójka ◽  
Paweł Kiełbasa ◽  
...  
Keyword(s):  
Laying Hens ◽  
Photon Emission ◽  
Natural Antioxidants ◽  
Egg Yolk ◽  
Biologically Active ◽  
Traditional Methods ◽  
Free Range ◽  
Required Quality ◽  
Weak Luminescence

The paper presents the results of an evaluation of the quality of eggs from laying hens kept in caged and free range systems using traditional methods and ultra-weak luminescence (USL). It was found that the tested eggs were fresh and were characterized by the required quality, as demonstrated by analysis of the egg white and egg yolk. Eggs from free-range laying hens were characterized by an eight-fold higher emission of photons compared to eggs from caged hens, and they had over three times higher content of natural antioxidants in the form of carotenoids. Most probably, the higher number of photons emitted is associated with a higher content of biologically active substances in the material under study. Photon emission also varies in different ways depending on the specific hen breeding system. Differences in time in the identified maximum values of photon emission result from the composition of individual parts of the egg. Different times in which the emission peaks occurred for free-range eggs and for caged eggs were observed. The application of the USL method in order to confirm its usefulness in the assessment of food quality requires further research.

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