DK64 Texture question

[AverageArtist]

How come only some of the game's textures get ripped when using texture dump plugins? (Mudman's Rice Build/Glide64 "Final") While others are just ignored, examples being Funky Kong's fur/skin, and Chunky Kong's white under shirt.

It happens with every other character model in the game, to a degree that makes me wonder just how the game actually renders it's textures.