How to correct the eight characters on the front legs of German shepherd?

First of all, many dogs get bowlegged because of floor problems. Nowadays, many people are laying tiles and floors at home. When the dog walks on such a slippery floor, his legs and feet slip and he walks unsteadily. They have been like this since childhood, and over time they have become bowlegged. I once knew a friend who always told me that the floor at home was like this, so I couldn't help it. . To change the dog's problem, it is useless to find the crux but not want to change it. Keep asking people what to do. In fact, it's too slippery at home, so you can add anti-slip mats. Secondly, we should supplement the dog with certain nutrition from an early age. Some parents think it's not good to tinker with dogs. In fact, it is unscientific to eat too much blindly, and it is even more unscientific not to supplement anything. Think about it, if you are a child, don't you need to give all kinds of nutrition from childhood to grow well? My dog has been eating trace elements and calcium tablets since childhood, one for breakfast and one for dinner every day. I haven't given more food for the time being. When the dog is still young, it can generally be corrected, and it should be given a leg massage every day. Just rub it. But be gentle, don't press blindly.