I think you'll find that the documentary was made a few years ago and since it was made there has been a very expensive court case regarding the ownership of the tigers & other issues.

As far as I can remember the tigers were donated by (if I remember correctly) the Chinese government and they ended up on an area owned by one of the more famous SA families. - I can't remember the details of the court case but get an idea that money was one of the issues....... Looked to me like a sad case of good intentions not mixing well with politics......

Either way (assuming it was the same programme we had here) it was very an interesting concept and good entetainment.