Duff S R
J Comp Pathol. 1985 Jul;95(3):373-82. doi: 10.1016/0021-9975(85)90041-6.
In a study of spontaneous orthopaedic disease in 104 broiler-type birds fed ad lib, 14 cases of hip instability were detected. Female birds were commonly affected and all were aged between 20 and 30 weeks. Although hip luxation was not identified, in most cases the gait abnormality could be attributed to capital femoral ligament failure. There were two main patterns of capital femoral ligament disruption; either the ligament was avulsed, together with a cartilage fragment, from its foveal attachment, or the ligament itself was partially or totally ruptured. Histological evidence suggests that repetitive trauma or acute trauma of sufficient magnitude may be necessary for ligament disruption. It is likely that the excessive weight gain of ad-lib fed birds predisposes to ligament damage.
在一项对104只自由采食的肉用型鸡自发性骨科疾病的研究中，检测到14例髋关节不稳定病例。雌鸡通常受到影响，所有病例年龄均在20至30周之间。虽然未发现髋关节脱位，但在大多数情况下，步态异常可归因于股头韧带失效。股头韧带断裂有两种主要模式；要么韧带连同软骨碎片从其凹窝附着处撕脱，要么韧带本身部分或完全断裂。组织学证据表明，韧带断裂可能需要反复创伤或足够严重的急性创伤。自由采食鸡的过度体重增加可能易导致韧带损伤。
