If you are feeding up this "cow" for slaughter, then it should get around 20 to 25 lbs per day, along with hay and/or grass.
Enough to fill a cow!!
45% of the bag every two days
It all depends on what's available in your area and what breed, type and size of milking cow you own. It also depends on what feed is already being fed to your animal.
Ten pounds per cow
Grain. Lots and lots of grain.
Around 900 to 1000 lbs.
A cow will typically eat 2.5% of her body weight of ration DM per day. As to what to feed her, hay, silage, grass and a little grain is the main rations to consider feeding a cow. When a cow is on pasture, she usually doesn't need any other supplementation except a bit of mineral.
More information such as type of feed (hay, grain, silage), type of cow (dairy or beef) and period of pregnancy (first, mid or last gestation) is needed before this question can be answered.
Only if they eat too much of it, just like if they eat too much grain in one sitting. Bread is a good substitute for grain for getting cattle to increase in weight, but it is of higher energy than grain and needs to be fed at a limited amount so that animals won't die of bloat or acidosis from eating too much bread.
A cow, be she beef or dairy, can give 12.0 tons of excrement per year per 1000 lbs. In other words, a 1000 lb cow will accumulate 12 tons of manure per year. A cow that is larger than that, like 2000 lbs, will give more; around twice as much.
Depending on age between 1-5 yrs. of age you should never feed more than 10 cups to any one cow. At 1 year feed one cup 2 yrs 2-3cups 3 yrs 3-4cups and 5 and up can be fed more and more gradually until about 9-10 cups but feed slowly because to much grain can kill or make a cow sick.
AnswerThe short answer is it depends on the size of the cow, if it's lactating, pregnant, the quality of the hay, etc.(Last answer said that they fed cows grain. Grain is NOT grass, cows are rudiments, grain lowers the PH levels of their stomach, causes bad tasting milk and lackluster health of the cow, generally used as a cheaper alternative, or to fatten a cow, in large scale production. Not recommended)