You can upload an icon for this item to File:Icon - Animal Bone.png or link to an existing icon from File:Icon - Animal Bone.png using code like #REDIRECT [[File:icon_filename.png]]. The icon should be in PNG format. You can override the default name using the iconname field of this template (not advised as it negates the automatic display of the icon by the itemlink template).
This is garbage. It is not deleted when you finish the quest, nor is it of any value. It is just one of many things the dog found.