Feline behaviour is the behavioural repertoire of the domestic cat (Felis catus), comprising social, communicative, predatory, and reproductive patterns and the developmental processes shaping them^[1]. It is organised around territorial security rather than attachment to people or other cats: cats descend from a solitary, territorial ancestor, and domestication has reduced antagonism towards larger animals without removing that reliance^[2]. Inadequate exposure to people during the socialisation period is a common origin of problem behaviour, and strongly aversive events at any age also contribute^[2]. Chemical signals carry much of the information on which cats act, and feline sensitivity far exceeds human perception^[2]. Housing constrains expression, and how far indoor environments meet behavioural needs is little studied^[3].