Normally deer can consume and eat corn easily. But feeding too much corn to deer can cause metabolic issues. Corn is low in protein (9%) and has a poor mineral profile. The added sugars can cause digestive issues, as well as an acidic rumen environment in deer.
So it is better to food deer with corn gradually and with proper adaptation, these same high-starch foods can be safely introduced into their diet. Doing this will help ensure that your deer stays safe and healthy while they enjoy a meal of corn!