Whether putting food in the refrigerator, the freezer, or the cupboard, you have plenty of opportunities to prevent foodborne illnesses. One of the basics of food safety is cooking food to its proper temperature.
I personaly always figured around 25lbs of hay per day for a average size cow when i was putting up hay. Alot of that of course they can get if pasture is available/accessable. Multiply that by your number of cows x average days you actually have to feed.
If the same group of 1,200-lb. cows were fed a ration where part of the ration called for corn silage to be fed at 10 lb. per head per day on a DM basis and the corn silage is 35% dry matter and 65% moisture, the pounds of corn silage in the diet would be 28.5 lb. (10 Ã· 0.35) per head per day on an as-fed basis.