ArticleAnimals : an open access journal from MDPI2025
Early-Life Socialization Enhances Social Competence and Alters Affiliative Preference in Piglets.
Article in Animals : an open access journal from MDPI, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Early-life socialization (comingling with other litters before weaning) may affect social behaviors in pigs, but whether the impacts are sex-dependent is unknown. We assessed the effects of early-life socialization on interactions and behavioral responses of female and male pigs in a controlled test setting. Piglets (N = 12 litters) were either comingled from 14 days of age till weaning (Socialized, SOC) or not (Control, CON). Pigs (n= 96) were weaned at 28 days of age and regrouped in mixed-sex groups of eight. At 40 days of age, pigs were individually placed in an arena with one pen mate and one unfamiliar pig of the same sex kept behind fences. Behaviors (exploring the environment, exploring the fences, social contact, aggression, etc.) were observed for 8 min. Generalized linear mixed models with treatment and sex as fixed and pen as random effects were used. Overall, males spent more time exploring the fences of conspecifics than females. Although aggression was displayed by only a small minority of pigs overall, it was more frequently directed towards unfamiliar pigs. Despite this low prevalence, SOC pigs (10.4%) were significantly less likely to show aggression towards strangers than CON pigs (27.7%) (
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