THE PRESENT INVENTION RELATES TO THE USE CANTHAXANTHIN AND/OR 25-HYDROXY VITAMIN D3 (25-OH D3) FOR IMPROVING REPRODUCTIVE PERFORMANCE OF ROOSTERS. MORE PARTICULARLY, THE INVENTION RELATES TO THE USE OF CANTHAXANTHIN AND/OR 25-HYDROXY CANTHAXANTHIN IN THE MANUFACTURE OF A FOOD OR VETERINARY COMPOSITION FOR IMPROVING REPRODUCTIVE PERFORMANCE OF ROOSTERS.