Effects of age at first access to range area on pecking behaviour and plumage quality of free-range layer chickens
The aim of this study was to investigate the effects of age on pecking behaviour and plumage quality of free-range laying hens during first access to range. Six hundred 16-week-old layer pullets obtained from a commercial company were housed in a experimental free-range house. The experimental house...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-03-01
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| Series: | Archives Animal Breeding |
| Online Access: | http://www.arch-anim-breed.net/58/85/2015/aab-58-85-2015.pdf |
| Summary: | The aim of this study was to investigate the effects of age
on pecking behaviour and plumage quality of free-range laying hens during first access to range.
Six hundred 16-week-old layer pullets obtained from a commercial company
were housed in a experimental free-range house. The experimental house
consisted of a slat-and-litter floor with range area and was divided into
three similar pens. The pullets were randomly assigned to a control and two
experimental groups according to age at first access to range area. The
birds were allowed into the range area for the first time at 18, 20 and 22 weeks of age in
the groups of treatment I, treatment II and control, respectively. Pecking behaviour
and plumage quality of the birds were measured for 8-week intervals from
24 to 48 weeks of age. Total feather damage significantly increased with age in all
groups (<i>P</i> < 0.040, <i>P</i> < 0.006, <i>P</i> < 0.001).
Compared to the control group, birds allowed into the range area earlier had
less feather damage. The feather score of the tail body region in all groups was significantly
greater (more damage) than in the others (<i>P</i> < 0.001).
There were no significant differences for the total pecking behaviour of the
birds in the groups at 24, 32, 40 and 48 weeks of age. Incidents of gentle
feather pecking in every period were more frequent, while aggressive pecking
was less frequent (<i>P</i> < 0.026, <i>P</i> < 0.007, <i>P</i> < 0.001). It can be
said that access to range area as early as possible at the beginning of
the laying period may be useful to reduce the negative effect of feather pecking
in free-range layer chickens. |
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| ISSN: | 0003-9438 2363-9822 |