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

  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},
  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… 
Effects of Different Induced Molting Methods on the Performance of Commercial Layers
It was demonstrated that induced molting significantly increased egg production from 65 to 75 to 81%, Haugh units from 80.1 to 85.6 to 87.0 and shell weight from 5.4 g to 6.5 g when compared to control.
Effect of hen age, moult, laying environment and egg storage on egg quality.
Optimal conditions for egg handling and storage of eggs are discussed in the final section of this chapter along with new technologies which may be implemented to ensure and extend the shelf-life of eggs in the future.
Effects of Hen Age and Forced Molting Programs on Egg Quality Traits in Laying Hens
The aim of this study was to determine the effects of hen age and forced molting programs on egg quality during the postmolt period. The experiment was conducted using 320 Hy-Line W36 hens (63 and 75
Facilities and Environment Advantages and Disadvantages of Conventional and Alternative Housing Systems
  • Biology
he animal care guidelines in this chapter are for the 3 major domesticated poultry species in the United States: chickens (both egg-type and meat-type), turkeys, and ducks. The physical environment
Nutrition, feeding and laying hen welfare
This review takes a broader perspective of nutritional welfare and considers the nutrition of hens managed in different production systems in relation to nutritional physiology, gut microbiota, stress, metabolic disorders and feeding management.
Mineral content of eggs differs with hen strain, age, and rearing environment
Objective of the current study was to determine the effect of conventional battery cages, enrichable cage systems, enriched colony housing, cage‐free, and free‐range rearing systems on mineral concentrations from TA Tetra White and Hy‐Line Brown hens at 44, 68, and 88 wk of age.
Phenotypic characteristic of junglefowl and chicken
  • T. Desta
  • Psychology
    World's Poultry Science Journal
  • 2019
Junglefowl display adaptive characters like seasonal breeding, well-established social hierarchy, explorative behaviour, territoriality, aggression and short ranged flight, however, they are smaller, produce less and mature later than commercial breeds, demonstrating their propensity for human landscapes.
Birds as Laboratory Animals
Application of Molecular Approaches for Understanding Foodborne Salmonella Establishment in Poultry Production
An overview of Salmonella issues in poultry, a general description of functional genomic technologies, and their specific application to poultry vaccine developments are discussed.
Study of Serum Biochemical Metabolites during Late Laying Phase of Layer Chicken
An experiment was conducted ontwelve adult white leg horn layers birds in their late phase of laying cycle from the poultry farm unit No. 3, department of Poultry Science, Bombay Veterinary College


Induced moulting procedures in laying fowl
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.
A practical method for induced moulting of caged layers that combines full access to feed and water, dietary thyroactive protein, and short day length
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.
Motivation of hens to obtain feed during a molt induced by feed withdrawal, wheat middlings, or melengestrol acetate.
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.
Utilizing different ratios of alfalfa and layer ration for molt induction and performance in commercial laying hens.
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.
Effect of temperature during induced moulting on plumage renewal and subsequent production.
The persistence of the improved food utilisation is related to energetic consequences of improved plumage renewal during moulting at the lower temperature, which can be seen as an acclimatization effect.
Physiology and behavior of the hen during induced molt.
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.
The Effect of Body Weight Prior to Molting in Brown Laying Hens on Egg Yield and Quality During Second Production Cycle
Results show that mid-light BW of flock prior to molting result in better egg weight, feed consumption and feed conversion ratio in the second production cycle.
Progesterone-Induced Unseasonable Molt in Single Comb White Leghorn Pullets
Abstract THE process of molting has long been of interest to poultrymen chiefly because of its incompatibility with egg production. The fact that the best producers are usually the latest to molt is
The physiology of induced molting.
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.
Effect of various combinations of alfalfa and standard layer diet on susceptibility of laying hens to Salmonella enteritidis during forced molt.
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.