Iron injection is administered to piglets within the first week of farrowing to

Iron injection is administered to piglets within the first week of farrowing to prevent them from being anaemic. Anaemia is a condition in which there is a deficiency of red blood cells or haemoglobin in the blood, which can lead to fatigue, weakness, and other health problems. Piglets are born with low iron levels, and their mother's milk does not provide enough iron to meet their needs. Therefore, they need a supplemental source of iron, which is usually provided through an injection. Iron injection helps piglets to develop a healthy immune system, grow properly, and prevent them from becoming weak and vulnerable to diseases. It does not harden them or prevent tail biting, and while it may contribute to their growth, this is not the main reason why it is administered.