An experienced dachshund with the correct conformation, and gameness, can bolt a fox from an underground den. Smaller dachshunds can locate and bay a fox; a larger dachshund can fight the fox harder underground.
Dachshunds can be taught to trail and tree raccoons and opossum at night, as well as squirrels by day.
Dachshunds will trail and flush pheasants and other game birds. In reasonable circumstances they will retrieve shot waterfowl.