[headcanon] The actual drop is a clump of rabbit hair.
The rabbit sheds fur periodically. That fur is typically treated as if it was sheep wool: you can make cloth out of it etc. But sometimes it drops a really nice clump of fur: large, with a good texture, and a homogeneous colour. When the player character finds one, they craft an imitation rabbit foot out of it, but for simplicity the game omits that.[/headcanon]

