1 23 Tropical Animal Health and Production ISSN 0049-4747 Volume 45 Number 1 Trop Anim Health Prod (2013) 45:281-288 DOI 10.1007/s11250-012-0213-2 Free range and deep litter poultry production systems: effect on performance, carcass yield and meat composition of cockerel chickens Olajide Mark Sogunle, Olagoke Ayobami Olaniyi, Lawrence Tokunbo Egbeyale, Olufemi Sunday Akinola, Taofeek A. Shittu, et al.