Earthdog, Kangaxx's the only lich for whom you have to find body parts. The dog bones you are referring to are in fact not golden
, you can use them in the De'Arnise keep quest. Spoiler:
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If you kill the dogs in the keep, you can make dog stew on the furnace inside. Have an invisible thief put the stew in the stash where the dog bones are, and the Umber Hulks will go there to eat them, so they won't bother you. You'll also get XP for this.
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Melusine, Archbabe of the Order of the Holy Flame and the Laughing Hyenas, &
Official Entertainer Elf of the BG2 Bar
Your voice is ambrosia