I recently found a baby grey squirrel in my yard. His mother abandoned him so I took him in. I’ve been able to get him to eat successfully and he recently opened his eyes. But I’ve noticed that when he walks, his back left leg just drags behind him. He can move it but he refuses to use it to walk. I don’t know if it’s broken or sprained or anything else. I can send a video to anyone wanting to help as I am very concerned for his health.