Use of an additive canthaxanthin based and annatto extract in diets of laying hens and its effect on the color of the yolk and the egg shelf life. Scientia Agropecuaria, [S. l.], v. 6, n. 3, p. 191–199, 2015. DOI: 10.17268/sci.agropecu.2015.03.05. Disponível em: https://revistas.unitru.edu.pe/index.php/scientiaagrop/article/view/957. Acesso em: 18 jul. 2026.