Hen behaviour and performance studied
The Animal Sciences Group of Wageningen University
published a new report: Effect of dietary energy and NSP concentration and
particle size of NSP on eating behaviour, feather pecking behaviour and
performance of laying hens.
An experiment with 588 ISA Brown layer strains was conducted to measure the
effect of dietary energy (11.8 versus 10.6 MJ/kg) and NSP (133 versus 195 g/kg)
concentration and particle size of the NSP fraction (fine versus coarse) on
eating behaviour, feather pecking behaviour and egg performance of laying hens
from 18 to 40 weeks of age.
Seven experimental diets were tested, each replicated seven times. It is
concluded that hens that were fed low energy, high (coarsely ground) NSP diets
spend more time on feed intake, compared with hens that were fed normal energy
or low NSP diets. However, these effects were not reflected by a reduced feather
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