What is the reason why the cat's front legs are a little bent?

It is usually caused by calcium deficiency, and so is my kitten. I picked it up from the outside and really watched it grow up. The result gradually turned into a round leg, which made me feel distressed. Later, I listened to the pet doctor and bought Dolly Jiepian. Now it's much more pleasing to the eye than before. Family and Jinling can really do it!