Before a consultation for behaviour in a ferret, a complete clinical examination should he performed and the animal's living conditions studied. The main reasons for consultation are biting, inappropriate urination and soiling, and difficulties with cohabitation with littermates. Lack of knowledge of the animal's behaviour can generate insufficient and ill-considered interactions and excessive and inappropriate punishments, which may be the cause of various problems of communication. Training is never completely acquired, which can demotivate exacting owners. These problems can be evidenced during behavioural consultations.