Prevalence of Keel Bone Damage in Red Jungle Fowls (Gallus gallus)—A Pilot Study

Abstract

The keel bone of laying hens is prone to deviations and fractures. Recent studies in the last decade report high prevalence of this welfare concern. The causative factors are not clear; however, selection for efficient egg production has been suggested as a major contributing factor. An important step to shed light on the role of selective breeding as an underlying cause of keel bone damage (KBD) in modern laying hens is to evaluate the keel bones of the ancestor, the red jungle fowl. The aim of this study was therefore to describe the prevalence of KBD in a study group of 29 red jungle hens and roosters by autopsy. No fractures were detected in the roosters, one had a very slight deviation. One of the hens had a fracture to the keel and 10 hens had a very slight deviation. Large scale studies are needed to disentangle the effect of different factors on keel bone damage.