Crows have been at the corn lately.
So... we soaked some of last year's corn, and it started to sprout!
Unfortunately it is all "mule corn" - hybrid offspring.
According to the 1881 Maine Farmer's almanac, if you put horsehair (or thread) through a handful of kernels, the crows will eat the corn, then when the thread remains coming out of their beak, they will scratch out their eyes trying to get the thread out.
We'll see. We only tried 3 kernels. Kind of morbid to think of blind crows gathered around the house, but it makes for good bed-time stories for the children...