In their latter half of their lives they go to a feed yard where they have access to a healthier, balance meal. Cattle cannot survive on corn alone. When raising cattle, feed yard managers plan diets for different age, weight and types of cattle's. .
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In 1920 vitamins A and D were discovered, soon after factory farming started. These vitamins were added to the animals food, then the animals are no longer required to exercise and sunlight for growth. This would permit a large quantity of animals to be raised indoors all year. One of the largest difficulties of raising these animals indoors was facing the spread of diseases. The diseases were fixed in 1940 when antibiotics were developed. To reduce the operating cost and increase of production machinery and assembly line were use. Animals are not considered animals, they are" food producing machines" Some animals are confined to small cages with metal bars, live in ammonia filled air and sometimes artificial lighting or no lighting at all. There are animals like chickens, cows and pigs that suffer mutilation when they beak searing, tail docking, ear cutting and castration. The purpose of this is because the animals start fighting because of the terrible living conditions. These animals are forced to live in small spaces where they cannot live in a relaxed manner. .
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Factory farms give animals hormones and antibiotics to help with productivity. Recombinant bovine growth hormone is one example. This was to produce the increase of the cow's milk production; later the factory farms found out it was unhealthy for the animals. Although the FDA approved the use of rGBH in dairy cows in 1993, this was done with the objection of farmers, public health advocates and welfare agencies, for it was an increase of physical harm to the cows. It was acknowledged that it increased the rate of 16 harmful physical effects on cows and was required an insert with the effects mention in every package sold.
