so A buddy just dropped off a bunch of organic dry whole corn- like 7 5 gal pails. is it ok to feed, or do I need to grind it? also got whole oats, barley, rice, wheat,and millet. I imagine the rice should be cooked, then fed? it is all surplus from an armageddon Y2K warehouse which is 10+ yrs old. It is mostly organic, and I am totally happy with it- am I gonna have issues with the birds/ eggs? i am thinking of dropping the layers mesh and feeding this stuff, 'cause I have a pile, and there is about a semi-truck load of it available. what else should I supplement? calcium and some salt? I can have as much as I can store, as the facility it is at will not be available much longer, so I really want to use it. thanks.