Egg size is an important factor that determines the profitability of egg production. In some markets a premium is paid for a larger egg size, while other markets require a smaller egg size.
This behaviour can be very frustrating to manage especially as it is nearly always healthy birds that smother and if the stockperson is not in the unit at the exact time they start to smother birds...
The route of infection is via the conjunctiva or upper respiratory tract with an incubation period of 6-10 days. Transmission may be transovarian, or by direct contact with birds, exudates, aerosol...
Breeding goals are defined by consultation between the geneticists and commercial departments on market trends. For ISA, the layer breeding division of Hendrix Genetics, the most important goal for...
Progress in Layer Genetics
In this article we will give an outline of a practical breeders’ perspective on topics varying from genetics, biotechnology, logistics, veterinarian issues and biosecurity.