From the beginning of life, discriminating between familiar and unfamiliar individuals and staying in contact with conspecifics are important to establish social relationships. To better understand these early social behaviours, we studied the different responses to familiar/unfamiliar individuals in 4-day-old domestic chicks (Gallus gallus) in three genetically isolated breeds: Padovana, Polverara and Robusta maculata. Chicks discriminated between familiar and unfamiliar individuals, staying closer to familiar individuals. Social reinstatement and fear responses were measured as the average distance between subjects, the latency of the first step and exploration of the arena differed between breeds. More socially motivated chicks, that stayed in closer proximity, were less afraid of starting to move and explored the environment more extensively. Interbreed differences in social reinstatement indicate that social attraction shows genetic variability from the early stages of life.

从生命的开始，区分熟悉和陌生的个体并与同类保持联系对于建立社会关系很重要。为了更好地了解这些早期的社会行为，我们研究了 4 天大的家养雏鸡（Gallus gallus）对熟悉/陌生个体的不同反应。) 在三个遗传分离的品种中：Padovana、Polverara 和 Robusta maculata。小鸡区分熟悉和不熟悉的个体，与熟悉的个体保持距离。社会恢复和恐惧反应被测量为受试者之间的平均距离，第一步的延迟和对竞技场的探索因品种而异。有更多社会动机的小鸡，留在更近的地方，不那么害怕开始移动并更广泛地探索环境。社会恢复的杂交差异表明社会吸引力显示出生命早期的遗传变异。