It’s interesting how these things are not as simple as they seem
en.wikipedia.org

Where once they occupied the whole Sahara Desert, they are now considered to be extinct in the wild, with no confirmed sightings in the wild for over 15 years.[1] Reports of sightings in Chad and Niger remain unsubstantiated, despite extensive surveys carried out throughout Chad and Niger in 2001-2004 in an effort to detect Sahelo-Sahara antelopes.[1] At least until 1985, 500 oryx were estimated to be surviving in Chad and Niger, but by 1988, only a few individuals survived in the wild.

A global captive breeding program was initiated in the 1960s. In 1996, at least 1,250 captive animals were held in zoos and parks around the world, with a further 2,145 on ranches in Texas.[citation needed] In 2005, at least 1,550 captives were managed as part of breeding programmes, and more than 4,000 are believed to be held in private collections in the United Arab Emirates.[1] Fenced in herds in three reserves in Tunisia, one reserve in Morocco and two reserves in Senegal are part of the reintroduction plans.[1]

So that ranch in Texas has almost twice as many onyx (onyxes? Onyxen?) than the rest of the world’s zoos. They probably live a better life in the open than penned in a small noisy exhibit. They surely lived a better life than the beef chicken or pork we’re all having for dinner tonight.