[Toph happens to be walking around in her dirt boots (boots made out of dirt! she can see and her feet stay warm!) when she happens to feel very large wolfy vibrations through the earth. She stops a moment to 'see' if that's what she thinks it is, and indeed. Giant wolf creature. Just walking around. Toph looks taken aback and decides it must be one of those forest guardian spirits that Aang was talking about. Like Hei Bai. She's just watching to see if anything happens, like people getting sucked into the spirit world.]