Minks raised and killed on fur factory farms are forced to live in small, dirty, barren cages and are denied any opportunity to swim; this causes them untold stress by suppressing their natural urges. Cramped wire cages prevent minks from indulging their innate desire to roam, and factory-farmed minks are often seen bobbing their heads and pacing—neurotic, repetitive behavior that is a sign of severe psychological distress.