Heat stress and age are common causes of reduced egg shell
quality and incur large economic losses in the Indian poultry industry. A
number of plants are known to contain high levels of metabolically active
vitamin D3. Studies have shown that under adverse conditions, these can be
useful in reducing the egg shell quality problems associated with age.
This article can also be found at Feed Mix, volume 11, no. 4
FM_11.4_8.pdf