An estimated 250,000 chinchillas are killed each year by the international fur fashion industry. Repetitive behaviors include head bobbing, head twirling, swaying, and biting the wire-mesh caging, in addition to pacing. Pelt biting and tail biting are also common behaviors prompted by confinement. They tremble, defecate, and withdraw to the back of their cages. They may attempt to bite when handled.
Many vixen fail to reproduce at all.
Infanticide and injury of kits are the results of disturbing the natural social hierarchy, an inevitable consequence of caging. Early and daily contact with humans would decrease foxes fear, but this is impractical and therefore not practiced at larger facilities. Instead of providing better living conditions or realizing that foxes should not be raised in cages at all, fox producers are attempting to breed animals with less anxiety. Inbreeding can lead to deafness, crippling, deformed sex organs, screw necks, anemia, sterility, and disturbances of the nervous system. Inbreeding for dark and black minks has been so intensive that these animals are prone to excessive bleeding and are highly susceptible to infectious diseases.