The tail, rather than being "natural," is an inanimate object instead. If the object is a food, this trait is sometimes referred to as "edible tail;" if the object is a plant, it may be referred to as a "floral tail." Object tails generally function as the object should (for example, a plant tail could wither and grow flowers/fruit).
The object itself can theoretically be anything, however, if the object is living in some way (this includes artificial intelligence), the tail should be classified as a sentient tail instead.
(Merged traits: edible tail, floral tail)