cracking of egg laid by a flock of layers in a farm can be corrected by
A.
addition of iodine to the water supply
B.
increasing the level of vitamin D in mash
C.
increasing the quality of calcium in mash
D.
increasing the amount of calcim, phosphorus and vitamin D in their feed
E.
increasing carotene and calcium level of the mash
Correct Answer: Option D
Explanation
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