Mother pigs on factory farms do.
Almost all of the 100 million pigs killed for food in the U.S. every year endure horrific conditions in factory farms. These social, sensitive animals spend their lives in extremely crowded, filthy warehouses, in which they are deprived of even natural sunlight until the day that they are crammed onto a truck bound for the slaughterhouse.
Mother pigs spend their lives confined to tiny metal crates. They are surrounded by cold metal bars and lie on wet, feces-coated concrete floors.
When they are old enough to give birth, female pigs are artificially inseminated and imprisoned for the entire length of their pregnancies in “gestation crates,” which are cages only 2 feet wide that are too small for them even to turn around or lie down comfortably in.
One worker describes the process: “They beat the shit out of them [the mother pigs] to get them inside the crates because they don’t want to go. This is their only chance to walk around, get a little exercise, and they don’t want to go [back into a crate].”