My GSD is just about six months. His ears have been up and down since day one. Right now, the passenger side is up, but the driver's side is down. I know that it's connected to teething, but I am not entirely certain which teeth are adult teeth and which are baby teeth. I also know that baby teeth are small and sharp----and usually found in my carpet or leg . They all look really white and really big. How do I determine the difference between baby and adult teeth?