Pretty easy to spot deer damage in corn. If you look at high density areas alot of the damage happens just before pollination. The deer being the brousers that they are will walk along and pullout the tassles from each corn plant. Taking off the top oh say 4-5 leaves and the tassle. That is the engine part of the plant and where it makes the most energy away from producing yield. Pretty easy to spot because the corn in August will be way shorter and no tassle. Probably losing 50% or better of your yield on plants that look like that. Once you get later into the summer you can spot deer damage because deer being the brousers that they are will walk along and nibble off the tops of the cobs, usually along the edges of the fields where top end yield aren't possible but it still robs yield potential. Then closer toward harvest as the stalks begin to dry down it doesn't take much to knock the corn plant over, so pretty much anything, deer, coon, turkey, you name it is causing damage just by being out there. Then there is the winter loss where the deer come up en masse to eat silage out of the pit or the silage bag to the point that you have to move shed antlers out of the way so you can scoop up silage. Let me just guess on the light side that we feed 60 deer 5 pounds of silage a day. That is basically us encuring all the expense of growing, harvesting and ensling 1 acre of corn specifially for deer. Not to mention that on their way to the silage they stop by the round bales to grab a bite of alfalfa on the way. I have no idea on how much monitary damage deer do on our farm alone but it is well into the 1000's. But nice to know some dude from indiana knows what is happening in Fayette and Clayton Counyt IA better than I do. Also to the FB haters out there. You do realize that they lobbied pretty hard for hunters, fishermen, trappers, hikers you name it. Because there was a chance that landowners could be sued after that field trip deal a few years ago where that chunky woman fell thru a barn floor. FB fought for landowners to allow people onto their land with out fear or being sued because of an accident. Feel free to hate, but with out them pushing back on that law you might not have permission to hunt on your favorite piece of ground anymore. I also like how the NR regulations are set up. Don't like it buy land some place else or move here. Have I pissed in everyones cheerios yet? LOL Have a nice day.