The yolk cholesterol concentration in the
eggs from the outdoor system might be influenced
by forage intake. Our result is in agreement with
Basmacioglu and Ergul (2005), who proved that
the housing system had a significant effect on the
cholesterol concentration. Premavalli et al. (2005)
showed that the eggs laid by the birds in the elevated
cage system had significantly (P ≤ 0.01) lower yolk
cholesterol (11.29 mg) than those from the deep
litter system (11.58 mg). Similarly, Sauveur (1991)
observed a significant increase in the egg cholesterol
from the hens housed in alternative housing
systems