It is well estabilished that the egg yolk color is one of
the very important factors for markrtiing in many
countries. Recently some feed additives and ingredients
have been used to manipulate and obtain for the
requested level of pigmentation in egg yolk color
(Santos-Bocanegra et al., 2004; Samli et al., 2005;
Hasin et al., 2006; Jafari et al., 2006; Nobakht and
Safamehr,2007).