BorderCollie

When this desperate owner drove over 1,000 kilometers to bring his 5.5-year-old, 22.5 kg Border Collie to Guangzhou Boss Animal Hospital, the dog was facing his fifth hip surgery in just over two months. Following an initial hybrid replacement at another clinic, the dog had suffered four consecutive dorsal hip luxations, each recurring within two to five days despite repeated attempts to alter cup angles down to an extreme 25°. Analyzing the patient's CT, I identified a striking biomechanical contradiction: an overly closed cup should cause ventral luxation, yet this dog kept popping out dorsally—proving the dorsal muscular and capsular envelope had been completely destroyed. My colleague Dr. Yu Jiezhou and I revised the joint using the Vetmaster cementless dual-mobility system reinforced with synthetic ligament suspension. By replacing mechanical friction with dual-mobility jump distance, we achieved rock-solid stability—demonstrated intraoperatively by gently lifting the dog off the table by the femoral neck without dislocation. Today, the dog walks soundly, free from the revision nightmare.