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Comparison of Four Induced Molting Methods Based
on Subsequent Performance and Welfare of Single Comb White Leghorn Hens |
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I.H. Khodadadi,
H. Moravej,
M. Shivazad and H. Mehrabani-Yeganeh |
Abstract:
A total of 400 Single Comb White Leghorn hens at 80 weeks
of age were used in present study. Four treatment groups that were consisted
of six replications with 10 hens per each replication were considered.
In the first treatment, food and water were removed for the first 2, 4,
6 and 8 days. However, on days 3, 5, 7, 9 and on day 10 until day 28 hens
were fed 45 g of food per hen (ON-OFF group). In the second and third
groups, food was withdrawn for 10, 14 days, respectively and oyster shell
and water were provided for ad libitum until day 28 (California
and North Carolina treatments (CAL, NC groups)). The last group (full-food
treatments (FF group)) was the hens that were non-food-deprived and were
fed corn molt diet for 28 days ad libitum. In all treatment groups
at day 29, hens were returned to a full food layer ration and received
16 h of light day-1. Body weight, egg production, egg weight,
relative eggshell weight, internal egg quality, egg specific gravity and
mortality were determined. Differential leukocyte count and antibody response
were also measured. The results demonstrated that induced molting increased
egg production according to pre-molt egg production. There was not a significant
difference in the rate of egg production during the peak period of post
molt production for treatments. No significant differences were detected
in differential leukocyte counts and antibody response against Sheep Red
Blood Cell (SRBC) between treatments at pre molt and post molt of the
experiment. This study indicated that diets with high corn level (FF groups)
are effective and simplified nonfood removal procedure for welfare molting
hens.
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How to cite this article:
I.H. Khodadadi, H. Moravej, M. Shivazad and H. Mehrabani-Yeganeh, 2008. Comparison of Four Induced Molting Methods Based
on Subsequent Performance and Welfare of Single Comb White Leghorn Hens. Pakistan Journal of Biological Sciences, 11: 98-102.
DOI: 10.3923/pjbs.2008.98.102
URL: https://scialert.net/abstract/?doi=pjbs.2008.98.102
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