I concur with
@Great Argus that the stork should definitely be left out, just in general, in my opinion. We should be moving away from flight-restricted bird and hoofstock mixes. I also would not trust the zebras with the gazelles either, in such a limited space. Realistically, it is of my opinion that if zoos want to do black rhinos and/or hippos, than they need to commit to black rhinos and hippos, and really have the space and setup for the species to thrive. I think you might be trying to do too much in too little of space. Sure you could probably cram mediocre rhino/hippo/hoofstock exhibits into that space, but you could also do one really nice rhino or hippo complex that does the animals justice and support the respective programs with space for additional animals, the ability to hold offspring, etc.
I think it is important to note that even though this mix has been “successful” at Dallas, it is highly situational and not a regular occurrence. It takes constant monitoring from staff and thorough communication between the elephant and hoofstock departments. Not all of the individuals of both species are included in the mix, and there are long stretches of time where the mix does not occur at all, whether it be due to animal concerns, staffing concerns, weather, etc. They have not conducted the mix since the calf was born.