Oloyo (2003) and Van den Brand et al. (2004), who
showed that egg weight increased with the increasing
age of hens. Regardless of the type of housing
systems the egg weight increased only slightly,
depending on the age of laying hens. The data in
Table 2 shows that there was a significant influence
(P ≤ 0.01) of the interaction between the housing
system and hen’s age on the weight of eggs.