Fifty triple pelvic osteotomies were performed in 30 young dogs with hip dysplasia and hip joint laxity. In affected hips, the mean pre-operative angle of Ortolani was 30º, whereas the mean angle of luxation was 18º. The mean radiographic femoral ‘overlap’ came to 26% and the mean angle of Norberg was 88º After surgery, these values changed to respectively 2 and 0° for the clinical angles and 69% and 113° for ‘overlap’ and Norberg. Loosening of the screws was observed on post-operative radiographs in 36% of the cases. Three months after surgery, forty-seven hips functioned very well to perfect. In three operated legs we observed neurological problems. Two of these legs were operated on for a second time; they healed later on. One year after the last surgical intervention, sixteen patients were examined. All of them showed stable femoral ‘overlap’s’ and Norberg angles. The animals functioned well. Three or more years after the operation(s), a telephone enquiry was carried out among 19 owners. None of the dogs had been in pain or had suffered from distress or stiffness; their mobility had been excellent.