Example of custom fur textures and fur shader using vertex shelling to get fur on mobile. Shader and textures created by me. Fur has some groom control with both overall direction and length at the shelling level, and the height map texture controls the rest of the groom.
Commercial Artist Jarrod Hasenjäger's rendition of the character for the game, was requested to be used for reference and can be seen here: https://www.artstation.com/artwork/2zWRa
3 mole versions in Unity preview window