Not sure about the Fall - my wild grasses are in seed now (I think that is defined as grain). Some of those grasses are adapted for out in the open and some are more edge of woods type grasses - but both kinds have gone to seed now and the chickens are having a blast harvesting.Mmmmm... isn't grain usually found in the fall and not year round in nature.....
I wonder how much grain is found where jungle fowl originated anyway.
Goes to show how much people have changed chickens