Source: https://www.youtube.com/watch?v=cZXgA5pHus8
But please, let us have mixed species exhibits even with predatory animals...
Not every predator will attack every herbivore!
Only 2 of these really showed carnivores with herbivores, and they where the weaker types, i mean, even if you put lions with a hippo, rhino, or elephant, in the wild, its far less likely they will even attempt attack them due to the size difference. but it is still a possibility if the lion doesn't have the knowledge that they shouldn't do it.
possibly a work around for people who want to have mixed enclosures like this, could be that if cubs are raised around a herbivore species (that is also young), they wont try to attack them?
but i personally wouldn't want a few select carnivores to not attack any herbivores at all, just because a cheetah wont kill a zebra with a herd, doesn't mean it wont kill a lone zebra or a gazelle (which people are more likely to have in with their zebra).
Cheetah are even known to take down full grown wildebeest if there is more than 1 cheetah.
Also, in the first image of this video, shows 2 zebra chasing off a cheetah, that could either mean the cheetah was stalking them.
or that they regularly scare it away for protection purposes, which couldn't be good for the cheetah.
second image again shows the cheetah following the zebra.
only reason id say that cheetah wont/cant attack, is that there is too large of a herd for it to even try.
which also means a high risk of it getting injured by a kick.
as for Servals, they eat rodents, birds, reptiles, frogs, and insects.
it would be highly unlikely for them to even consider a hippo, even a pigmy.
these i can see with herbivores without issue, as long as the herbivores are not too small or sick. (eg, rabbits, Tortoise)