My three-year-old Bichon has a dislocated hind-leg bone and limps after running: what to do?

A dislocated hind-leg bone needs a high-resolution X-ray to tell which bone is displaced and how severe it is, then a suitable treatment plan. If a long bone like the femur, tibia, or fibula is displaced, internal or external fixation can be chosen; internal fixation generally heals better but costs more. If it is a kneecap displacement (patellar luxation), it is also graded by severity: grade 1-2 may be managed conservatively with oral medicine and restricted exercise, while grade 3-4 should be corrected surgically promptly. So the plan differs by degree and location, but in all cases limit the dog’s exercise to avoid worsening the injury; even with conservative care or external fixation, rest at home or in a cage and follow the vet’s advice on bone-recovery nutrition or medicine.