Mixed-Species Paddock (6 Species)

Aug. 5th, 2014. Greater Kudu, Beisa Oryx, Scimitar-Horned Oryx, Yak, Eland and Nilgai.

Good photo snowleopard. These are species that aren't found in many zoos. The zoo shouldn't mix African and Asian animals together.
They should divide this paddock into two-
African
Greater Kudu
Beisa
Scimitar-horned
Eland
Asian
Yak
Nilgai
I have only seen greater kudu at Detroit Zoo and Columbus and nilgai at an exotic petting zoo at the Lake County Fair in Ohio.

What's the deal with the oryx species? Is there any way to avoid hybrids being born?