LOL.
I could write a book on what costumers tell me what animal is causing trouble and what really is happening.
Buckwheat, you probably talking Sweet Corn?
Coon know exactly when to hit the Sweet Corn. Same applies to Field Corn.
Field Corn, I find that Bear knock down corn stalks in a circle. After that, appears Bear sit in the middle and eat.
Groundhog and Coon will take individual stalkes. Squirrels usually take the ears.
I like to take my wife in the Corn field and kiss her behind the ears.