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Abstract

Experiments were carried out to test the hypothesis that hens in large flocks have home ranges in parts of the pen and that they form subgroups. In a tiered aviary system (density averaged 16 hens/m2 of floor area), 8 flocks of 568±59 ISA Brown laying hybrids were kept in pens. Half of the pens...

Author(s)
Odén, K.; Vestergaard, K. S.; Algers, B.
Citation
Applied Animal Behaviour Science, 2000, 67, 4, pp 307-320
Abstract

The effects of the presence of males on female aggressiveness and feather pecking in groups of about 500 laying hens housed in an aviary system were studied. In all, 10 groups of ISA Brown laying hens were observed at 21, 35, 45 and 55 weeks of age on 2 farms, during 2 years. In the second year,...

Author(s)
Odén, K.; Vestergaard, K. S.; Algers, B.
Citation
Applied Animal Behaviour Science, 1999, 62, 2/3, pp 219-231