The developing coxofemoral joint was evaluated in 7 dogs by means of pelvic scintigraphy (bone scanning) and pelvic radiography. Each procedure was performed monthly for 10 months to determine if early degenerative changes associated with canine hip dysplasia could be detected scintigraphically before they could be detected radiographically. At the end of the experiment, it was obvious that pelvic scintigraphy was a less sensitive tool for the diagnosis of canine hip dysplasia than pelvic radiography.