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.
Wastage among systems for feed can range from 5 percent to 40 percent. Over a 200-day feeding period, this can change the feed inventory required from 5670 lbs. to 7560 lbs., or 2.8 tons to 3.8 tons. This would be a difference of $40 to $90 per cow per season, depending on your hay cost. Even moving from a moderately efficient system (15 percent waste) to a very efficient system (5 percent waste) would save 600 lbs. of hay per animal, or $12 to $27 per head.