Creighton Samuels wrote: I suspect that the root of my failure wasn't the animals, per se; since there were many lots of traditional field corn growing nearby. I suspect that my property lacks important nutrients to grow corn effectively, and I'm entirely unwilling to resort to artificial fertilizers.
Either that, or because you didn't use artificial fertilizers, your corn was much tastier than the nearby traditionally grown stuff. Animals know!
I've grown grain sorghum successfully, although never on a large scale, just more of an experiment. My goats and chickens loved the grain and the fodder, and it certainly was easy to grow and harvest, although I suspect that I have less deer pressure than you. One thing about sorghum, is that the grain is more accessible to birds because it's right out there at the top of the plant.
For what it's worth, I think your corn spiral was an excellent idea. I'd certainly give it another try. I find there are so many variables that can cause failure, it's worth at least several years of experimentation to figure it out.