This was actually posted a little while back. Some Thailand Redditors commented, saying that the whole zoo is horribly run, and how they treat the animals very inhumanely (much like a regular circus with animals).

Most of the locals try to encourage tourists not to go there, as it's very disturbing. Wish I could find the post.

According to Wikipedia, they force tigers to jump through rings of fire, and they breed many of the tigers for export into China. Obviously they do not go to the zoo's...

Snopes wrote a passage on it. It's really quite disturbing:

"Although these pictures might appear charming and innocent, the AWI noted back in 2004 that there may be a darker side to the Sriracha Tiger Zoo, as press reports stated that Sriracha was under investigation for illegally breeding protected wildlife for commercial export and had been implicated in the sale of a hundred tigers to China (where there is strong demand for tiger body parts for use in traditional Chinese medicines). The AWI also noted that in late 2004 the zoo was closed for a month when between 80 and 100 tigers died or were euthanized due to an avian influenza (probably spread via the raw chicken carcasses fed to the tigers) that swept through the facility."

http://www.snopes.com/photos/animals/tigerpig.asp