Limb conditions that predispose sheep to lameness in the arid zone of Nigeria

A total of 5549 sheep were examined for indication of lameness consequent to limb conditions in the arid zone of Nigeria. Out of these, 1051 showed evidence of signs of lameness in at least one limb. A prevalence rate of 18.09% was recorded in the sheep examined. The common limb conditions that predisposed sheep to lameness were overgrown hooves, traumatic injuries, interdigital pouch inflammation, limb conformational anomalies and fracture. Hoof overgrowth ranked highest as a cause of lameness. The proportions of lameness were higher during the wet months. Sheep below 4 years of age showed higher incidence of lameness compared to those above 4 years. However, there was decreasing frequency and increasing severity of lameness with age in the sheep. More lameness cases were recorded in the forelimbs than in the hindlimbs. There was no significant difference as to which gender was more predisposed to development or manifestation of lameness. Frequency of lameness in sheep in the arid zone of Nigeria is high. It is pertinent that thorough and effective management practices and early diagnosis of lameness should be performed adequately so that these conditions can be put under control to allow for increased productivity of sheep in the arid zone of Nigeria. © 2002 Elsevier Science B.V. All rights reserved