Radiographic screening of horses prior to purchase or admission to studbooks has become an importanttool for evaluating the osteo-articular status of the animals. Developmental orthopedic disorders (DOD) arethe main cause of potential lameness in youngsters. The genetic factor associated with DOD has beenestablished, and specific selection schemes have been developed to diminish the prevalence of lesions.Increasing knowledge of prevalence in different breeds may help in developing specific breeding strategies.This article presents the results of the radiographic screening of 676 stallions presented for sire admissionto the Royal Belgian Sports Horse Society (Studbook sBs). On average, two radiographic findings were notedper horse. The prevalence of DOD in this population was 38.9%. A high percentage of horses showedradiographic signs of effusion of the distal interphalangeal joint. An uncommon fragment location at theproximal tubercle of the talus was found in 7 horses. The present paper presents a review and discussion ofall the radiographic findings.