Jurek, thanks for the link, it is so interesting …
Yes, in Safaripark Beekse Bergen african elephants succesfully mixed with hamadryas baboons, but there was a cross-contamination with
Salmonella typhimurium.
Here you can read more about it:
http://www.dpz.gwdg.de/pr/pr65/deleu.pdf
….And in this thread there were mentioned another mixing with elephants beforehand …
Sun, yes, current elephant enclosures are not suitable to keep hyraxes inside the enclosure…but these did not constucted for this reason. I was mentined that elephants-hyrax mixed enclosures would be creating in zoos which have relatively small area.
Originally I imagine that hyraxes live together some similar species that has been mentined by yourself…and with some additional species. Caldwell Zoo also has a mixed-exhibit with hyraxes: Gunther’s dik dik, rock hyrax, cape teal, white-faced whistling duck, Hartlaub’s touraco, Daveta golden weavers, african grey parrot, spur-wing lapwing, great plated lizards, giant plated lizards, spur-thigh tortoises, leopard tortoises, african cichlids …but certainly not only about the "kopje-theme" …
But there is a really essential question: what is a better solution, to exhibit animals together only just a similar habitat origin, or over and above that if they have any other (for example evolutionary or behavioural) connection?