Ensuring a good welfare for animals housed in zoos, is not an easy job. It might not even be something we will ever really get a perfect grip on. Animal species have evolved over many years and their physical, physiological, social and behavioral traits have been developed in order for them to survive as best as they can in their natural environment. In captivity, animals may face a number of challenges which evolution has not prepared them for and disables the animal to fulfill their behavioral needs. The absence of these, climate, diet, the size and characteristics of their enclosure or the fact that they have to rely on humans for their every need can cause an animal to feel stressed in which it starts to perform a stereotypic behavior. Repetitive, abnormal behavior is often regarded as an indicator of poor welfare and is studied as a coping mechanism, and measures of stress which can potentially go on to cause brain dysfunction. The study of stereotypic behavior is complicated with many important factors that determines the health of a captive animal. 'Zoochosis' will bring you the whole picture of how animals experience living in a stressful and unnatural environment, and how it effects their mental and natural life.