Layers

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Feeding to prevent feather pecking in layers

In laying hens, animal welfare is particularly focused on feather pecking behaviour. In this respect nutrition plays an important role. Feed form, feeding strategy and nutritional factors all seem to have their influence on the birds satiety and pecking behaviour.
By Dr Marinus van Krimpen, Wageningen UR Livestock Research, Lelystad, the Netherlands From 2012 onwards, a ban has been introduced on cage housing systems for laying hens in the European... read more »

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Vitamin nutrition for hatchability and chick liveability (2001 special)

As hens age, their vitamin requirements change. Vitamin deficiencies in broiler breeder hens not only affect the birds themselves, but also have profound implications for subsequent broiler performance. Vitamin supplements in a breeder feed must therefore ensure that the vitamin requirements of the developing embryo and the chick post hatch are adequately met. read more >

Formulating feed from waste and by-products

Much of the world's human population suffers from malnutrition. In the developing market economies in particular, this is a great problem and the gap between the developed and developing regions tends to increase rather than decrease. Accordingly, much effort is being made to study the possibilities of utilising agricultural, animal and industrial waste in the nutrition of poultry. As a consequence, there can be a reduction in the use of traditional feed ingredients such as maize, wheat and soybeans, which can be consumed by humans. read more >

How nutrition affects immune responses in poultry

Nutrient recommendations, such as those set by National Research Council (NRC) of the United States, are usually based on the needs of healthy birds under ideal management, and require adjustments for practical production situations. Attention should be given to those nutrients that are associated with the development of the immune system. read more >

Involvement of calcium and phosphorus in bone and shell quality of early maturing commercial layers

Leghorn strains are continuously changing to meet market demands. The age of maturity in commercial pullets has steadily decreased, and egg output and case weights continue to increase. Consequently, nutritional management also needs to change to meet the genetic potential of the new strains. When new genetic lines are introduced, issues such as calcium and phosphorus management need to be constantly evaluated. read more >

The use of essential oils and their compounds in poultry nutrition

Essential oil blends should be regarded as one of the tools available to animal nutritionists in formulating diets for poultry. Further research is continuing to develop our understanding of the real potential of these products. read more >
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