We describe the case of a periprosthetic fracture in a 9-year old, European Shorthair cat weighing 7.3 kg. The fracture occurred as a result of a fall, 2 weeks after implantation of a cemented Micro-THR-System hip prosthesis. The fracture was classified as type B1 according to the Vancouver classification. The fracture was anatomically reduced and stabilised using a locking plate with two monocortical screws, four bicortical screws and two cerclage wires. At follow-up after 3 weeks, the cat was weight-bearing but limping. At the 5-week follow-up, and subsequently (at 10 weeks, 6 months and 2 years), the cat’s ambulation was normal. At the 10-week follow-up, the fracture was radiographically healed. At the 2-year follow-up the cat was walking normally and had no radiographic evidence of osteolysis around the screws or bone reabsorption due to stress protection.