ArticleFrontiers in veterinary science2026
Quality of life framework in poultry: a methodological approach to characterize the behavior of chickens reared under free-range conditions.
Article in Frontiers in veterinary science, 2026. 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
The "Quality of Life" (QOL) is a relatively recent approach to animal welfare that emphasizes animals' subjective experiences and the need to ensure long-term positive affective states. In this study, the QOL framework was applied to poultry. Four slow-growing chicken genotypes (A, NN, CB, and LD) reared under free-range conditions were used as a case study to characterize behavioral patterns and gain insights into their welfare and adaptive capacity. Behaviors were monitored over extended observation periods (5 weeks) and classified as positive or negative affects; a quantitative indicator of their balance was then calculated (i.e., proportion of positive to total affects, PPA). The classification of behaviors, such as sheltering and attacking, proved to be challenging, necessitating a careful analysis of their functional significance, occurrence patterns, and distribution across the lifespan of the animal. The PPA index revealed that positive effects occurred more frequently than negative ones across all genotypes, ranging from 73.7 ± 4.8% in LD to 92.5 ± 3.6% in NN, without significant differences among genotypes. The study also highlighted that behavior classification should not be done
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