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. Sci. agropecu [Internet]. 2015 Sep. 1 [cited 2026 Sep. 6];6(3):191-9. Available from: https://revistas.unitru.edu.pe/index.php/scientiaagrop/article/view/957