Assuming that social experiences at an early age may be a determinant factor in the process of formation of social network and attachments, we studied the social interactions of isard, or Pyrenean chamois, kids (Rupicapra pyrenaica pyrenaica) during their first year, to understand “how” sociality arises in isards rather than “why”. Interactions with the mother were affiliative, and approaches of kid to mother or vice versa were generally followed by another “positive” interaction. Interactions between kids were also frequent and playful. Interactions with both mother and peers provided positive reinforcement which may strengthen bonds. However, early interactions of kids with yearlings and other adults provided negative experience, no attachment thus developing from them. Social affinities of adults as well as the social and spatial organization of groups may be understood when ontogenetical history and immediate causality are highlighted.