ArticleFrontiers in microbiology2026
High-zinc diets accelerate molting and recovery by remodeling the cecal microbiome in laying hens.
Article in Frontiers in microbiology, 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
Introduction: Conventional fasting molting can restore laying performance but imposes substantial physiological stress and welfare concerns. High-zinc diets (2% ZnO) have been proposed as a less stressful alternative, but their mechanisms remain unclear. Methods: This study compared fasting-induced molting with zinc oxide supplementation in 384 Lohmann Pink hens (65 wk). Serum, cecal contents, and ovaries were sampled across six stages from pre-molt to post-molt recovery. Results: ZnO accelerated cessation of lay (5.75 vs. 8.87 d) and earlier recovery to 50% production (15.25 vs. 16.62 d) with lower weight loss (25% vs. 30%). Multi-omics revealed that high-zinc feeding enriched beneficial microbes (e.g., Discussion/conclusion: These findings support that a high-zinc-associated microbial-metabolic profile mitigates stress, accelerates ovarian reset, and shortens the time to restore production.
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