This is not an antisocial behaviour per se, but may arise readily in animals that show anti-social behaviours, as these tend to be the more intelligent or high-strung individuals. The reason being that these animals do not have enough mental stimulation in their environment and develop boredom, or perhaps they are having conflicts with a cagemate. Look at fur biting as a ‘bad addiction’ much like smoking in people. Comparing two people that smoke cigarettes, a person who is stressed may smoke a cigarette more often that one who is relaxed. However, the people who do not smoke at all will not be at risk for responding to stress by increasing their cigarette consumption. Likewise, some chinchillas will never resort to fur-biting, while others use this as a coping mechanism to certain stressors. This behaviour can become habitual or chronic over time, and occurs when a chinchilla bites at its fur, causing its coat to develop a choppy look. Although stressors are a trigger for fur-biting, medical issues such as ill health can also be a cause. In any case, it is important to try and resolve the self-mutilation as promptly as possible. It is usually not a behaviour that will just ‘go away.’ The stressor must be identified and completely removed from the chinchilla’s environment; the end result will be a much more relaxed and satisfied chinchilla.