History, changing scenarios and future strategies to induce moulting in laying hens

@article{Yousaf2008HistoryCS,
  title={History, changing scenarios and future strategies to induce moulting in laying hens},
  author={Mohammad Yousaf and Abdul Shakoor Chaudhry},
  journal={World's Poultry Science Journal},
  year={2008},
  volume={64},
  pages={65 - 75}
}
Moulting is a natural phenomenon in birds during which they replace old plumage with new feathers, reduce feed intake, lose body weight and suspend reproduction. Moulting in laying hens can be induced by using photoperiods, feed deprivation or restriction or diets containing minerals or variable amounts of other ingredients. Induced moulting can result in higher egg production and improved quality. It reduces mortality, production costs and investments in new farms and hatcheries. While feed… 
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TLDR
Hormone-induced moulting is another method and involves the use of the gonadotropin-releasing hormone (Gn-RH) agonist and has an advantage over the conventional feed restriction procedure in that it does not require severe initial body weight loss to attain maximum egg production in the post-moulting period.
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TLDR
Data is presented suggesting that the use of thyroxine (T4) to induce moult in poultry may be a viable alternative to previous methods involving feed withdrawal or feed avoidance.
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TLDR
Hens molted using a diet containing MGA have a similar motivation to obtain feed as control hens; therefore, this alternative does not appear to increase hunger.
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TLDR
Al falfa or alfalfa mixed with layer ration appears to be viable alternatives to conventional FW methods for the successful induction of molt and retention of postmolt performance.
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TLDR
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TLDR
Hens are capable of vigorous activity throughout feed deprivation periods typical of induced molts, which do not appear to take birds beyond the second phase of fasting, and alternative induced molting methods are being sought to reduce animal welfare concerns.
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TLDR
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TLDR
The process of molting, and the subsequent recovery from the molt, may be viewed as a complex physiological constellation, induced by environmental and nutritional cues, involving endocrine systems, reproductive tissue structure and function, lymphoid structure, and immune function.
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TLDR
It is suggested that alfalfa can potentially be combined with layer ration to limit SE infection and still induce a molt comparable with feed withdrawal, and physiological parameters showed the alFalfa treatment groups had reductions in weight loss, ovary weight, and feed consumption when compared with the full-fed standard commercial layer diet hens.
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