Anyone's kid have an inward aka "pigeon" toe? I know they say it's common. But my son seems severe.…

Anyone's kid have an inward aka "pigeon" toe? I know they say it's common. But my son seems severe. His right side turns completely as if pointing to his left foot! I've mentioned it to the doctor but they say it's fine. He also seems to trip/fall when it comes to his right side. Like he's dragging that leg, to me it seems limp. There's definitely less muscle tone. I'm actually afraid it's more serious than an inward toe.