How do you fix a chewed up banister?

To fix a chewed-up banister, first, clean the area thoroughly to remove any debris. Use wood filler to fill in the chewed areas, smoothing it out with a putty knife and allowing it to dry completely. Once dry, sand the surface to match the surrounding wood, then repaint or stain as needed to blend it in. For deeper damage, consider replacing the affected section or using wood epoxy for a more durable repair.