The present study was conducted to evaluate the effect of chilled drinking water on the productivity of laying hens under constant high ambient temperature. A total of seventy-two, 123-day-old Hy-line brown layers was divided into two equal groups. The first group (UDWG) was given unchilled water (23.0±2.5°C) as a control, and the second group (CDWG) was given chilled water (16.0±0.5°C). The la...

Bird eggs should have high internal and external quality to maintain the economic life of the product and hence recognizing and understanding thefactors affecting egg quality have great importance. In this experiment, 18 healthy eggs were selected and then exposed to a 1.5 Tesla magnetic field. After this stage, 6 samples of them were immersed in sunflower oil and stored for two days. In ...

A series of incubation and broiler growth studies were conducted using one strain of broiler chicken (fast feathering dam line) observing incubation effects on femoral bone ash % at hatch and the ability of the bird to remain standing at 6 weeks of age (Latency-To-Lie). Egg shell temperatures during incubation were consistently recorded. Parsimonious models were developed across eight studies u...

Unquestionably, the sanitary quality of the hatching eggs will affect the quality of the day-old chicks. The egg leaves the oviduct free of any microorganisms (except for vertically-transmitted pathologies), but even eggs which are laid « clean » present a wide diversity of bacteria on the shell. Furthermore, after being laid, the egg’s temperature drops (from 41 to 21°C), which causes embryoni...