Importance of Vitamin A in feed supplementation

Vitamin A is a fat-soluble vitamin that is important for reproduction and several metabolic functions. Requirements for vitamin A are generally met from green growing forages. During drought conditions it is important to provide supplemental vitamin A to cattle.  

Mineral supplements with 150,000 to 200,000 international units of vitamin A per pound can be used to provide vitamin A if cattle consume close to the 4-ounce target intake. Some cubes and other feeds contain vitamin A as well. Four or more pounds per day of a feed with 15,000 international units per pound would supply enough vitamin A for most cows.