The chickens were fed basal diet and added four
levels of grit. The grits sources consisted of limestone,
oyster shells and sandstone at a ratio of 30:30:40. Grits
were prepared in several particle sizes namely 0.5 mm ; 1.0
mm; 1.5 mm and 2.0 mm as they were needed in this
experiment to supply the chickens of 2-4 weeks; 4-6
weeks; 6-8 weeks and 8-10 weeks of age, respectively.
The mineral composition of the grit is presented in
Table 2. The diet and grit were given separately.
Water was provided ad libitum. The chickens were
weighed every week and the remaining feed was weighed
every day.