Deer have different nutritional needs throughout the year. The Antler King® Program is designed to meet these needs in the most economical way. Corn has been used extensively in feeding deer because it is a good source of energy and is almost always cheaper per ton than a commercially manufactured supplement. This use of corn has resulted in a continuing problem with grain engorgement. Grain engorgement is caused by the rapid intake of a large amount of corn or other grain sources over a short period of time. The grain is rapidly fermented which causes a rapid drop in rumen pH. This damages the rumen wall and may actually lower blood pH causing metabolic acidosis. A severe diarrhea can develop and death is often the result.