Egg size has been widely studied in the
context of life-history theory because it can
be highly variable. Some studies have shown
that egg size can affect both parental and
offspring fitness. Williams (1994) studied
the relationship between egg size and
offspring quality in birds and came up with
equivocal results. The author reported that
egg size typically affects hatchling mass
more strongly than it affects hatching size
in birds because the main effect of egg size
lies in the mass of the residual yolk sac that
the chick retains at hatching. The objective
of the present study is to determine the
effect of egg size on hatchability, post hatch
performance and carcass characteristics of
broilers hatched from small, medium and
large size Nigerian eggs