I think I recall seeing a hyrax in the kopje exhibit, but not positive, that's why I didn't say anything. They're also in what was the bat cage and in the childrens zoo.
Yeah, I saw two Hyraxes when I went on June 6th. They sometimes have a lot of one animal and they're in multiple exhibits around the zoo. Like the Visayan Warty Pigs, Columbus Monkeys, Francois Langurs, and Spotted Necked Otters. Its also tough to find all the animals because they hide so well in this exhibit.