Selenium is a form of Vitamin E that usually occurs naturally in the feed for your livestock animals. However, there are several geographic regions where selenium is not found in the soil, so the locally grown hay will be deficient requiring you to supplement. That happens to be the case for our ranch as well.
For goats, a deficiency in Selenium can lead to White Muscle Disease and you can especially see this in your kids. You an consider Selenium the ‘Folic Acid’ for your farm as this is a very important nutrient when your does are pregnant.
Selenium is important for the pig as well increasing the efficiency of the immune system.
Supplementing can be as easy as sprinkling it on their feed, and for goats you can leave the minerals out for them to freely consume.