ABSTRACT

This study aimed to determine the prevalence of keel bone deviations and feather damage of laying hens in two different free-range housing systems under commercial conditions. Both of the free-range systems had an indoor barn and an outdoor range area. The floor of the indoor barn consisted of litter and either perches (litter and perch, LP) or slats (litter and slats, LS). The hens of both flocks were raised under identical conditions in the same house during the rearing period and then divided and transferred to two different free-range housing systems for the laying period. Examinations were conducted on the flocks at the end of the production cycle. Hens from the LP group had a greater prevalence of keel bone deviation and feather damage compared to hens from the LS group. The highest percentage of severe feather damage was found in the back and tail body regions in both flocks. The findings of this study are based upon the evaluation of two Turkish laying flocks. Therefore further research with more replicates of these treatments is needed to reach a general conclusion.

摘要

这项研究旨在确定商业条件下两种不同的散养房系统中产蛋鸡龙骨偏差和羽毛损伤的发生率。这两种自由放养系统都有一个室内谷仓和一个室外范围区域。室内谷仓的地板由垃圾和栖息地（垃圾和鲈鱼，LP）或板条（垃圾和板条，LS）组成。在饲养期间，将两只母鸡的母鸡在相同的条件下在同一家禽中饲养，然后分开并转移到两个不同的散养房系统中进行产蛋。在生产周期结束时对羊群进行检查。LP组的母鸡与LS组的母鸡相比，龙骨偏移和羽毛损伤的发生率更高。在两个鸡群的后部和尾部部位发现严重的羽毛损坏率最高。这项研究的结果基于对两个土耳其产蛋鸡群的评估。因此，需要对这些治疗方法进行更多重复研究，以得出一般结论。