Nice shot, although it clearly shows the crossed eyes from inbreeding (which is of course why AZA facilities like this one are not supposed to have white tigers). In all fairness, they do not breed them and they have a second tiger exhibit with SSP malayan tigers.
When I was there, they had a sign about this, stating that white tigers can be used to draw in crowds to raise money for more legitimate conservation projects. This is, of course, a matter of debate. There are plenty of AZA zoos, the majority actually, that get by just fine with normal colored tigers, including their near neighbor in Dallas.
