The factory farming industry strives to maximize output while minimizing costs—always at the animals' expense. The giant corporations that run most factory farms have found that they can make more money by cramming animals into tiny spaces, even though many of the animals get sick and some die.
On today's factory farms, animals are crammed by the thousands into filthy, windowless sheds and confined to wire cages, gestation crates, barren dirt lots, and other cruel confinement systems. These animals will never raise their families, root around in the soil, build nests, or do anything that is natural and important to them. Most won't even feel the sun on their backs or breathe fresh air until the day they are loaded onto trucks bound for slaughter. The green pastures and idyllic barnyard scenes of years past are now distant memories.
These animals are treated with such neglect and brutality as you can see directly from this video link: