Stop feeding the deer asap. Supplemental feeding of deer in Michigan has greatly enhanced the Bovine T.B. problem and you don' t want to go near that. Use nurtient supplements during the different seasons and do the food plots. An adult deer will eat 2-5 lb. a day depending on the season and so on. So supplemental feeding is quite expensive especially when compared to the agricultural methods.
Corn is one of the worse things you can feed a deer especiall during the harsh winter we are experiencing this winter. Feed enough corn and you' ll kill the deer. They will get bloat. When feeding corn you need some sort of buffering agent to neutralize the starch in the corn or the deer will pass the rumin needed to digest the food products and will be emptied of the ability to digest. They will die with belly' s full of corn. On the other hand the carbohydrates in the corn will give then the energy to stay warm. Just be careful. It' s best to have them in good shape by the end of fall and let nature do it' s thing with the week and sick.