Most pigs are raised in small pens on slatted metal or concrete floors in buildings with a manure pit below. Pregnant sows are raised in gestation crates. These crates are actually small, individual stalls on slatted floors which severely restrict freedom of movement, including turning sideways or lying down comfortably. When giving birth, the sows are moved to farrowing crates which have side areas for the piglets. Out of frustration and boredom, they often bite at the bars that confine them. Piglets are weaned from their mothers after only two or three weeks. FACT considers these conditions very inhumane for the intelligent and social pig. There is inadequate opportunity for exercise, conditions are unsanitary, with hogs and sows often caked in their own feces, and the air is heavily fouled with the fumes from manure pits which lie beneath the slatted floors.