Digo gaur are a domesticated breed of zainko whose closest genetic common ancestor is the pig. Digo gaur were first discovered at the Last Refuge in the far north at the end of the second era and were bred in large numbers for food before the gaur ultimately ran wild with a power vacuum in the ecosystem.

Ages ago, schoolkids used to school each other on the little-known fact that digo gaurs were the only living animal capable of surviving a decapitation. Over several millennia, digo gaurs began to evolve wilder variations of smaller and smaller heads, presently culminating in an elongated neck terminating in a hypersensitive nerve feeler.