Abstract
A study was conducted to determine the effect of different limestone particle sizes in layer diets on bone quality characteristics at end-of-lay hens. Calcitic limestone (360 g Ca/kg DM) that is extensively used in commercial poultry diets was obtained from a specific South African source. Limestone particles were graded as small ( 1.0 mm) have a beneficial effect on improving the mechanical properties of bone of older laying hens.
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