You don't even have to grind it. I go out after we're done cutting corn and gather the ears of corn the combine missed and throw those out to them during the winter months. They peck it off the ears themselves.
Leave it on the stalk and let it dry in the feild. Gather the ears and keep them dry. They will eat it on the cob. Less work for you. They will also adore fresh corn juicey with corn milk in the summer.
P.S. where are you that you have a 1/4 acre of fresh corn this time of the year?
yes you can feed dry corn to chickens without grinding it.just pick your corn.an store it in a corn cribb or bin .leaving it on the cobb.then get whatever amount of cobbs you want.an feed your hens.they eat the corn off the cobbs.