Look - its not that feeding corn is always a problem - but it can be - especially when the deer aren't adjusted to digesting it yet. Especially stopping feeding them in a tough winter. Other factors figure in as well.....

There is tons of information out there, here's a couple links that explain it - use GOOGLE to find more info if you're not sure.

http://www.montana.edu/wwwpb/reso/toughlov.html

http://www.umext.maine.edu/WildaboutNature/0101.htm

http://beef-mag.com/mag/beef_range_feeding_vs/

FH