An experiment was performed to investigate the effect of animal versus vegetable protein sources in the diet on the development of behavior in laying hens. A diet containing protein sources of only vegetable origin was compared with four diets, each containing one of four processed animal proteins (PAPs). Two PAPs (Daka-58 and Sonac-60) were classified …
In this study, the effects of the inclusion of different vitamin C levels in the diet on bone mineral density …
Under current practices, broiler parent stock (broiler breeders) encounter several welfare problems, such as feed restriction and injury during mating. Intensive selection for production traits, especially growth rate, is associated with increased nutritious requirement and thus feed consumption, but also reproductive dysfunctions and decreased sexual activity in broiler breeders. A resulting serious welfare problem is …
This study was aimed to evaluate the effect of force molting programs on egg production and quality oflaying hens. Total of 165 white Bovines laying hens at 72 weeks of age were divided into four groups. Birds in-group 1 (control), birds in group 2, 3 and 4 were fasted for 10, 12 and 15 days, …
An experiment was carried out to determine melamine residual levels in eggs by feeding laying hens 200 or 1,000 mg …
In spite of the large amounts of money invested in research, breeding, and the improvement of commercial egg-type strains, high …
Layer breeding companies apply selection criteria to improve over 30 traits important for commercial egg production. Intensive selection for egg …
An experiment was conducted with 672 Hy-Line W-36 Single Comb White Leghorn hens (69 wk of age) to evaluate the …
The objectives of this study were to compare the behaviors, postures, and heterophil-to-lymphocyte ratios (H:L) of laying hens housed in a cage system when offered a Ca premolt treatment and low-energy molt diets vs. a traditional feed withdrawal (FW) treatment during and after molt. A total of 144 Hy-Line W-36 hens (85 wk of age), …
The studies have been carried out to emphasize a proper methodology for determining trans fats, to determine natural levels of …
The objectives of the current study were to evaluate the effect of feeding diets containing 0, 10, or 20% distillers …
This study aimed at studying alternative methods to induce molting and to compare them with the conventional forced-molting method (fasting). In the experiment, 420 70-week-old layers were used. The total experimental period was 140 days. Molting was induced during the first 28 days, when birds were submitted to the experimental treatments, and bird performance and …
Corn and soyabeans may not be available in many countries particularly those which do not have sufficient foreign currency or …
This study was a 3 × 8 factorial arrangement of 3 nutrient densities (low, medium, and high) and 8 commercial …
An adequate supply of all nutrients, including proteins, fats, carbohydrates, vitamins, minerals and water, has to be provided to support …
Insufficient feeder space for laying hens could increase competition at the feed trough, leading to disrupted feeding, inadequate nutrient intake, stress, and reduced productivity. The effects of feeder space allocation (FSA) on physiology and productivity were evaluated in beak-trimmed Hy-Line W-36 hens (n = 480). They were obtained at 16.5 wk of age and housed …
1. An experiment was carried out to examine the suitability of using maize silage, barley—pea silage and carrots as foraging …