Highlights • Litter differences in play behaviour occur pre- and post-weaning.• More than 25% of the variance in locomotor play was attributable to the litter.• 'Non harmful fighting’ was unique in showing consistency pre- to post-weaning.• Litters differ in their locomotor play response to weaning (‘litter weaning effect’).• Suggests a ‘common factor’ at the litter level creating variation in locomotor play.

中文翻译：

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顽皮的猪：根据窝和发育阶段的一致性和游戏变化的证据

亮点 • 断奶前和断奶后的幼崽玩耍行为差异。• 超过25% 的运动游戏差异可归因于幼崽。• “无害打架”在断奶前后表现出一致性方面是独一无二的。 • 同窝仔猪对断奶的运动反应不同（“窝仔断奶效应”）。 • 建议窝仔水平的“共同因素”导致运动运动的变化。