Many die from heat, dehydration and sickness. The life on the factory farms for these animals are truely up to the workers. In most cases, the animals are treated like machines. Many are used to just produce more offspring and have their babies traumatically taken at birth. Cows are used for their milk and once they are done producing it, they sometimes are ground up into beef, never to see their children.
Pigs await their slaughter in crowded cages often covered in one another's feces.
While in these farms, cows and chickens are often injected with hormones. These hormones have devastating effects on both animals. Cows are injected to produce more milk and some suffer from enlarged udders that can drag on the ground. Until more laws, such as the Animal Welfare Act, are created and enforced, it is up to the people to speak out on such cruelty. The longer we are sheltered from such occurrences, the worse the situations for the animals will get.