The risks of feeding corn to wildlife have been very understated, and most doing it have no idea the risks. I really believe the increase in wildlife "feeders" (which mostly throw "deer corn" from Walmart) has been a significant reason for wild turkey population drops across the entire Southeastern U.S.
The issue of aflatoxin being present or developing in corn is not as significant Texas for two reasons:
1) Texas generally has a less humid climate than most Southeastern states.
2) It's illegal to sell aflatoxin corn in Texas.
------ So guess what? It gets sent to Walmarts all across the Southeast to be sold as "deer corn" in other states.
Aflatoxin may seldom kill deer, but if often makes them "sick", lowering their resistance to diseases, weakening them physically, making them more prone to dying from other causes.
Also, since they eat too much corn when it's available, those deer can suffer nutritionally, much like giving an obese child nothing to eat but more candy. This can be counter-productive to growing anything but fat.