i give it to them as a treat. I only have 4 chickens so cut the cob into several sections and only give one a day so they don't get fat.
If you have too much and it will go off before you can use it up, cut the kernels off and freeze them to use later.
I wouldn't use it as their main feed though.
If you don't want to freeze it, you can try drying it like this:
*To oven dry corn, plunge the freshly picked ears into boiling water for five minutes. Then dunk them into cold water. When cool enough to handle, cut the corn off the cob. Spread it out on large trays, preferably enamel, some home dryers say. The corn can be one to 1 1/2 inches in depth on the trays. Place them in a warm oven, about 150 degrees F. and leave them until the corn is thoroughly and rather brittle.
*If you have a wood burning stove, you can dry corn on the back of the stove or in the warming oven. You will want to stir it occasionally so it dries evenly.
*With a food dehydrator, follow the directions for drying corn that come with it.
*Store the corn in glass jars, plastic bags, plastic containers ,or clean coffee or shortening cans with tight fitting lids.