Markhor would thrive in Texas Terrain. I know several have been killed free range.
I have hunted for them out next to the Indian head ranch where there was some wild. But only seen them from a mile away or so.
They are very hardy and wild so I don't believe the predators would be an issue.
I knew a guy that shot a decent one in that area and just let it lay after a pic. He didn't want to mess with a goat, he said
I asked if I could have the head and he still said no because it was too far to get to. I about wanted to punch the guy and he didn't believe me when I told him what they are worth.