Several hypotheses have been proposed to explain the initial steps in the domestication process of the wolf. We discuss the human-initiated model in which wolf pups were brought to camp sites by male hunters and cared for by nursing women. A good relation between the more sociable and playful pups and the women and their children likely formed affiliative bonds and led to the survival of such pups into maturity. Some of these animals could have reproduced and delivered at least one litter. A selection on the behaviour of subsequent generations could ultimately have led to Palaeolithic dogs.

中文翻译：

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孕育孤儿：上古石器时代驯化过程的开始

已经提出了几种假设来解释狼驯化过程的初始步骤。我们讨论了由人类发起的模型，在这种模型中，雄性猎人将狼幼崽带到营地并由哺乳妇女照顾。较善于交往和嬉戏的幼崽与妇女及其子女之间的良好关系很可能形成亲缘关系，并导致这些幼崽得以存活到成熟。其中一些动物可能已经繁殖并传递了至少一窝。对后代行为的选择可能最终导致了旧石器时代的狗。