Pigeons only require small amounts of Vitamin C. and it is essential to the immune system, it is also an anti - oxidant acting as a preventative to hardening of internal body fats and arteries. C sometimes called Vitamin D3 is Cholecalciferol. The synthetic pharmaceutical Vitamin D2 is Ergocalciferol. As described at the beginning of this article, it increases calcium absorption from the diet, essential for ongoing bone production and eggs. It also acts as a clearing agent for phosphates from the liver via the kidneys.
Antibiotics can totally cancel metabolic absorption.
There is an occasional deficiency in new born which may result in mental disorder or blindness. In anything but essential need cases, Vitamin E should not be supplemented but taken naturally from the diet. It is needed for the producing blood clotting. It occurs totally naturally and does not need adding to any diet, never found in deficiency nor toxic in nature. I hope some of the wise amongst you will save this article in a better understanding of vitamins and supplements, because although they are an essential part of life, they must be treated with respect.