This study was conducted to evaluate the effect of Rovabio, dietary energy, and protein on performance, egg composition, egg solids, …
The feather condition and behaviour of laying hens in modified cages with elevated (28 cm above floor) and conventional (6 cm above floor) height feed troughs was measured at 32–34 and 56–59 weeks of age. Feather cover was generally better at the younger age than the older, and in cages with the elevated trough as …
Maximum daily temperatures in excess of 30ºC are common in many table egg producing regions of the world. Such temperatures …
The level of a single essential amino acid that is either deficient or in excess of requirement may result in …
Two experiments of 4 × 2 × 2 factorial arrangements of 4 dietary energy levels, 2 molting methods (feed withdrawal …
To approximate a commercially induced molt, feed was withdrawn (FW) from Hy-Line W-36 hens (65-wk-old) until they lost 35% of their initial body weight. Behaviors of 36 FW hens and 36 control hens were videorecorded on Days 1 to 3, 8 to 10, and 19 to 21 of FW, when FW hens reached 15, 25, …
Feed deprivation has been adopted by the commercial egg industry to induce molt because it is the easiest method to apply and produces the best results. Feed deprivation, however, raises concerns about animal welfare. Birds respond to long-term feed deprivation in three phases. The first phase lasts at most a few days, during which physiological …
The behavioral responses of laying hens to a 4-day fast were investigated. Three hundred and sixty Hyline W77 (W77) and 360 Hyline Brown (Brown) lPweek-old pullets were housed as pairs in cages in separate rooms for each stock. At 63 weeks of age, feed was withdrawn for 96 h from half of the W77 hens. …
1. The applicability of different ratios of bitter vetch seed as a new method for moult induction in laying hens …
In the commercial egg industry the management practice of using feed withdrawal to induce a flock to molt has been …
A study was conducted to evaluate skeletal quality and eggshell parameters of molted hens at the end of the second …
We experimented to evaluate the effect of a number of molting techniques that appeared to be less stressful than the conventional feed withdrawal (FW) method on postmolt performance. The molting techniques involved a continuous FW (T1, control group), 1 d FW followed by feeding a grape pomace (GP) diet containing 10 ppm thyroxine (T2) ad …
Several dietary alternatives to feed withdrawal have been proposed to induce a molt in laying hens. This study compared the behavior of laying hens on an alfalfa crumble diet (ALC) to hens that were either in a conventional layer diet (FF) or hens that had feed withdrawn (FW) during a 9-d trial. Each treatment consisted …
An experiment was conducted using 336 White Leghorn hens (60 wk of age) randomly assigned to one of four treatments that consisted of feed removal for 4 or 10 d or no feed removal with ad libitum access to 95% corn or 95% wheat middlings molt diets that contained supplemental minerals and vitamins. At the …
This study examined the effects of dietary energy content on the egg production and egg quality of hens kept in 3-hen conventional cages or 8-hen furnished cages. A total of 1,088 Lohmann Selected Leghorn hens were housed in either furnished or conventional cages and offered low- or high-energy diets (from 2,342 to 2,414 kcal/kg or …
In order to find out whether furnished cages contribute to improving the welfare of laying hens, humerus quality and adrenal responsiveness were evaluated in laying hens reared in standard (S) and furnished cages (F). Four cage models were used: S5, a standard cage model with 5 hens per cage; S6, a standard cage model with …
Effect of access to wood shavings and processed paper in the litter bath of modified cages on performance, gizzard activity, …
Although the transition from cage housing to alternative systems commenced more than 20 yr ago, there is still an ongoing …