Classic and Non-Classic Effects of the Duration of Supplementation of 25-Hydroxicholecalciferol in Broiler Chicken Diets.

The present study aimed to determine the effect of different times of supplementation of 25-hydroxycholecalciferol (25(OH)D) in broiler chickens on the performance, carcass and cuts yield, bone resistance, plasma concentration of 25(OH)D, and expression of the mTOR gene. The treatments were a control diet (CD) supplemented with 3000 IU vitamin D/kg of feed from 1 to 46 d, or the CD + 2760 IU (69 mcg) of 25(OH)D/kg of feed from 1 to 21 d, from 1 to 35 d, or from 1 to 46 d. The period of supplementation of 25(OH)D did not affect the growth performance of broilers, but the breast meat yield was linearly increased in response to increasing days of supplementation ( < 0.

Regeneration of the intestinal mucosa in Eimeria and E. Coli challenged broilers supplemented with amino acids.

The aim of this study was to evaluate the regeneration of the intestinal mucosa in Eimeria and E. coli challenged broilers supplemented with glutamine, arginine, and threonine. Six hundred male broilers at one d of age from the Cobb strain were utilized.