Gestation crates are narrow metal cages just large enough to fit one pig (usually just 6.5 ft x 2 ft). They are used to house pregnant sows until they are about to give birth, when they are moved to farrowing crates. Female pigs who are used for breeding live all of their lives in these two types of cages. Their bodily waste drops through the slats on the floor into a pit below. These poor animals are driven insane because they are denied the ability to perform basic necessary functions.
“I think gestation crates for pigs are a real problem … I mean basically you’re asking a sow to live in an airline seat.” ~ Temple Grandin