Just a heads up, Corn does nothing for keeping animals warm when its cold.
Corn keeping animals warm is a misunderstanding on what a HOT feedstuff is.
The term HOT refers to energy amount and that the feedstuff is a high energy ingredient. Now corn is a high energy feedstuff BUT it the energy is...
Whole Corn is fine as is, just don't over feed it. Keep it about 10% of there diet or about 10 pounds of Corn to 90 pounds of there regular poultry feed.