“Throughout their four-month pregnancies, many of these sows live in cages just large enough to contain their bodies. As the sows grow bigger, the tight confinement means they can lie face down but can't flop over onto their sides. The floors under these ‘gestation crates’ are slotted so that urine and feces can slip through into vast cesspits. Immobilized above their own waste, the sows are exposed to high levels of ammonia, which causes respiratory problems. Just before they deliver, they're moved to farrowing crates, in which they have just enough space to nurse.
“Once the piglets are weaned, it's back to the gestation crate for the breeding sow, which averages two and a half pregnancies per year. After three or four years, the sow is slaughtered for meat.”And this, among other disturbing peeks into the world of captive sows: