Table 1 Incidence of congenital deformity of cervical spine in apparently normal, dead in the shell, full term chick embryos observed in commercial hatcheries
From: Cervical scoliosis and torticollis: a novel skeletal anomaly in broiler chickens
Item | Unhatched eggs examined | Dead in shell embryos showing signs of cervical scoliosis and torticollis |
|---|---|---|
North American studya | 2730 | 132 (4.8) |
European studyb | 2360 | 93 (4.0) |