Early and late cognitive and behavioral aspects associated with range use in free-range laying hens (Gallus gallus domesticus)

• DOI: 10.1016/j.psj.2024.103813
• Publication Date: 2024-04-30T08:52:03Z
• Authors: Vitor Hugo Bessa ...; Jeanne Seressia; Nathalie Même; Jérémy Bernard; Marie-Hélène Pina...; Fanny Calenge; Alexandre Lecoeur; Louise Hedlund; Per Jensen; Vanessa Guesdon; Ludovic Calandreau
• Keywords: Gallus gallus domesticus; Cognitive flexibility; Cognitive test; Animal cognition; Neophobia

Individual differences in free-range chicken systems are important factors influencing how birds use the range (or not), even if individuals same environmental conditions. Here, we investigated various aspects of birds' behavioral and cognitive tendencies, including their optimism/pessimism, flexibility, sociability, exploration levels, associated with they may change over time (before after access). To achieve this, one hundred White Leghorn laying hen chicks underwent three distinct behavioral/cognitive tests—the bias test, detour multivariate test—prior to gaining access range, between 9 39 days age. After was allowed (from day 71), bird's evaluated seven non-consecutive 74 91 age). Subsequently, a subset birds, classified as high rangers (n = 15) low based on use, retesting previous tests 94 108 Our results unveiled negative correlation trend evaluation ambiguous cue subsequent (rho -0.19, p 0.07). Furthermore, were faster learn task (χ2 7.34, df 1, 0.006), coupled increased sociability during test -0.23, 0.02), contrasting high-ranging counterparts, who displayed more exploratory behaviors (F(1,27) 3.64, 0.06). These patterns fluctuated access); however, conclusively attributing these changes aging development or remains challenging. Overall, our corroborate that individual be linked offer novel perspectives early traits use. findings serve foundation for adapting environments meet needs improve animal welfare future.