Don't tie your legs, which is even worse.
The best thing is calcium supplementation and exercise, such as walking for half an hour to an hour every day to see the endurance of your dog. At first, I just walked around and increased day by day. Remember that it is a walk, that is, you lead it, and you can't let it run by itself. Dogs with leg problems can't run well.
It is recommended to use tri-refined calcium gluconate for calcium supplement, that is, tri-refined blue bottle. Vitamin d can be used in Icoxin AD drops, the kind that children eat. Just feed it once every other day, and then be sure to bask in the sun. This is very important. Walking+sunbathing is more important than calcium supplementation, and then calcium supplementation is more important than vitamin D (this is my dog's experience after actual combat, but my dog's hooves are planed. For the landlord's reference. )