Interactions Resulting from Intermingled Caging of Laying Hens

Nutrition/Mortality Interactions in Laying Hens

A laying trial compared two Australian egg laying strains with an imported brown egg layer. They were fed a high quality diet recommended for the imported bird or a good Australian layer diet. In addition, these two diets were fed in a free-choice system whole wheat, protein concentrate and limestone chips. The birds throughout received standard husbandry regarding vaccinations and lighting. Al...

Development of an Ex Vivo Protocol to Model Bone Fracture in Laying Hens Resulting from Collisions

Fractures of the keel bone, a bone extending ventrally from the sternum, are a serious health and welfare problem in free range laying hens. Recent findings suggest that a major cause of keel damage within extensive systems is collisions with internal housing structures, though investigative efforts have been hindered by difficulties in examining mechanisms and likely influencing factors at the...

Comparative gonadotrophic potency of anterior pituitaries from cocks, laying hens and non-laying hens in molt.

A bulk of studies on the assay of gonadotrophic hormone content of the anterior pituitary from the animals in various reproductive conditions has been done. Riley and Fraps(1942b) assayed pituitary glands from chickens in various reproductive stages, judging the gonadotrophic potency by the increment of uterine weights of immature mice, and concluded that glands from non-laying hens produced a ...

Interactions of dietary zinc and vitamin D in laying hens.

Erysipelothrix rhusiopathiae in Laying Hens

The bacterium Erysipelothrix rhusiopathiae can infect a wide range of mammals (including humans) and birds. Disease outbreaks (erysipelas) have been considered unusual in chickens internationally, but outbreaks with high mortality and egg production losses have been diagnosed in Swedish laying hen flocks every year since 1998. Different aspects of E. rhusiopathiae infection in chickens were exa...