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.
Re: Average hay consumption. A cow needs about 3 per cert of its body weight in roughage a day, a 1000 lb cow needs 30 lbs of hay if it has no other source of roughage.
Per head daily of protein supplement should be fed along with a small amount of grain Dairy Cattle: Lactating cows:2.lbs of dry roughage daily per 100lbs of live weight. 2 to 3 lbs of concentrates per head Dairy Heifers:2 to 3 lbs of concentrates per head on good roughage. 4 to 5 lbs on poor roughage.