Zoochosis: the mental illness that develops in animals held captive in zoos. Most often, it is seen in what are called stereotypical behaviors, which are often obsessive, repetitive actions that serve no purpose.

Zoochosis is displayed through a wide variety of diverse stereotypical behaviors. These include, but are not limited to:

Pacing

Circling

Rocking back and forth

Swaying

Head-bobbing

Over-grooming

Hair-pulling and feather-plucking

Bar-biting

Excessive licking

Vomiting and regurgitation

Playing with excrement

Eating disorders such as anorexia

Addiction

Self-harm