That's a really interesting article. That guy has guts, feeding the hyenas like that. What a weird/cool tradition.
Hyenas are really fascinating. I've read bits and pieces of "Cry of the Kalahari", a book about a couple who went and basically lived with hyenas in Africa for a little while. The hyenas that spent time with them became almost tame; they would sit by them while they ate, watch them wash, etc. If vet med hadn't worked out for me, I would have become an animal behavioralist (I took two semesters of Animal Behavior and my prof talked a lot about hyenas).