Intensive farming methods have improved productivity, but public concerns have arisen regarding the welfare of production animals, particularly laying hens, and consumers demand higher animal welfare Show more
Intensive farming methods have improved productivity, but public concerns have arisen regarding the welfare of production animals, particularly laying hens, and consumers demand higher animal welfare standards in all animal production systems. This study evaluated the impact of conventional cage (CC) versus cage-free (CF) housing systems on the gene expression of some peptide hormones regulating food intake along the gut-brain axis in laying hens at 80 wks. Sixty thousand Hy-Line Brown hens were reared under commercial farm conditions until week 15. At 16 wks, hens were randomly assigned into two housing systems: CC (450 cm Show less