Relevance of navel quality of day-old chick on organ development, initial performance, and bacterial presence
Mariana Cristina Vieira; Henrique Carneiro Lobato; Laryssa Fernanda Bernardes; Clayton Barbosa Galvão; Julia Macedo Fernandes Oliveira; Victoria Veiga Alves; Leticia Cury Rocha Veloso Arantes; Oliveiro Caetano Freitas Neto · 2025 · Poultry Science
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract
This study aimed to evaluate effects of day-old chick navel quality on the absorption of the residual yolk sac, visceral development, macroscopic organ alterations, yolk sac bacterial presence and performance of broilers up to 14 d of age. A total of 372 male Ross 308 day-old chicks were classified as first or second-grade based on navel quality. First-grade chicks were chicks with the yolk sac completely retracted and a fully healed dry navel, without any further abnormality. Second-grade chicks were chicks with incomplete healed navels, based on the presence of residual yolk membrane or a bl
Abstract by Mariana Cristina Vieira; Henrique Carneiro Lobato; Laryssa Fernanda Bernardes; Clayton Barbosa Galvão; Julia Macedo Fernandes Oliveira; Victoria Veiga Alves; Leticia Cury Rocha Veloso Arantes; Oliveiro Caetano Freitas Neto, Poultry Science (2025) — licensed CC BY 4.0.
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Metadata source: DOAJ · DOI 10.1016/j.psj.2025.106031