1Department of Animal Science, Faculty of Agriculture, University of Uludag, 16059, Gorukle, Bursa, Turkey.
2Department of Animal Husbandry and Health, Keles Vocational School, University of Uludag, Keles, Bursa, Turkey.
*Corresponding author: Tel: 90 224 2941550; Fax.: 90 224 4428152; E-mail: aipek@uludag.edu.tr
A total of 420 male day-old-chicks of a slow-growing genetic line (Hubbard ISA Red JA) were used as the trial material. The treatment groups were: Dilute-AL (energy and protein diluted diet fed ad libitum), Dilute-R (restricted energy and protein diluted diet), High-AL (high energy and protein diet fed ad libitum) and High-R (restricted high energy and protein diet). Restricted birds showed a greater percentage of time spot pecking, preening and in feather maintenance and less time resting than birds fed ad libitum but the differences were relatively small.
Free-range, diet, performance, behaviour
