IMHO get a second and maybe a third opinion. is your bully overweight? IMO she should be between 43 ad 48 pounds but I don't know her lineage. we had big problems with Mimi (RIP) growing too fast and causing joint hip problems. Growth management, recommended by a good vet instead of surgery, kept her moving and running until she passed at 11 years old. Bruno walks like a cowboy with loose hips but he still outran me when I had to chase him down the street the other day. we rescued him and put him on a weight management diet but he is still growing at 15 months. Sorry I don't trust when a vet says a bulldog needs hip/leg surgery. at 10 months your bully is still growing. I would look at reducing food intake first. weight management and growth control are really important in keeping a bulldogs joints healthy.