Environmental enrichment can increase the occurrence of natural behavior and improve leg health and other animal welfare outcomes in broiler chickens. This study aimed to assess the effects of three environmental enrichments, specifically hay bales, step platforms, and laser lights, on subclinical spondylolisthesis prevalence, productivity, behavior, and gait of broiler chickens (Gallus gallus domesticus). Twenty-four hundred day-old male Ross® AP95 chicks from a commercial hatchery were used in a completely randomized design with four treatments and four replicate pens per treatment. Pens contained either a Control (C) treatment, an environment similar to a commercial broiler chicken system without environmental enrichments, or an environment with either additional hay bales (HB), additional step platforms (SP), or additional laser lights (LL). Performance, yield, behavior (frequencies), gait score, and subclinical spondylolisthesis prevalences were assessed. When raised with SP or LL access, fewer chickens had subclinical spondylolisthesis than chickens without enrichments (C) or with HB access. Chickens with access to SP exhibited higher wing yield and less abdominal fat than animals from the C group. Chickens from the LL and HB treatments explored more and rested less frequently than animals from the C and SP treatments. As chickens aged, they became less active, exploring less and increasing resting and comfort behaviors. Treatments did not affect gait. Gait was not associated with subclinical spondylolisthesis prevalence. Environmental enrichments benefitted chicken health (subclinical spondylolisthesis) and behavior (exploration) without negative consequences for performance and yield.
A microbiota intestinal desempenha papel fundamental na modulação da resposta imune e inibição de patógenos, além de estimular o sistema nervoso central por meio das vias neuroendócrinas e imunes. Desta forma, a inclusão de probióticos à base de bacilos na dieta das aves de postura promove a moderação da microbiota, beneficiando a digestibilidade e aproveitamento dos nutrientes, resultando em aumento na produtividade e qualidade de ovos. Também estimula a síntese e secreção de serotonina, proporcionando melhora nos índices de bem-estar nas aves, reduzindo o estresse e agressividade entre elas. O presente estudo foi conduzido com o objetivo dei avaliar o efeito da suplementação de GalliPro®MS para aves de postura, em relação aos indicadores de produtividade e qualidade de ovos e bem-estar. A utilização do probiótico proporcionou melhor produção de ovos, redução de ovos trincados e sujos. O GalliPro®MS também diminuiu a frequência de comportamento agonístico, como arranque de penas e brigas. Outra característica favorecida pela inclusão do probiótico nas dietas foi a viabilidade do lote, com redução na mortalidade deste grupo de aves.
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