Honestly, I can understand where the OP was coming from with his post. He wasn't trying to say, "Ha ha, a muzzled hyena, HILARIOUS!!" It was more like . . . the dead parrot sketch from Monty Python. An exaggeration of a common training issue (dog-on-dog aggression) with an unexpected twist. (Who expects to see a baboon and hyena on a leash? Not me!)
Getting back to reality, I feel bad for the hyenas, wild animals who should have been left in their dens and allowed to stay wild. On the other hand, it sounds like hyenas (or at least these particular hyenas) are NOT used for dog fights, but instead mostly as advertising for the fetish charms and for fake "wrestling" with the men. Like someone else said, a third-world circus. Honestly, many of the problems I have with the hyenas could be applied to American circuses too . . . Elephants were meant to roam around for miles and miles, not be crammed into a truck and driven around from city to city while being forced to do stupid tricks.