First off, this is not a zoo. They rescue discarded animals, which I respect, but if you want to go to a zoo, go elsewhere.
The enclosures, though in this case you could easily call them cages, are not the huge, natural looking spaces that zoos have in the modern age. The lions and tigers live like junk-yard dogs in derelict fields with what looks like a two-car garage to retreat to. The tigers have a small fountain to swim in which was filthy when I went. The poor bear (the last of the big animals) seems half mad. I have never seen it not pacing or spinning in place.
I was shocked, considering the "zoo" is in Texas and not even open in the morning, that they do not have water fountains! If your kid gets thirsty, you have to walk all the way to the front and buy water at $2 a pop! While I recognize they are a non-profit, I find that tantamount to entrapment especially seeing as their primary targets are thirsty children.
The staff/volunteers are rude if you happen to see one. I work for PARD and would be disciplined or fired if I treated the public like they treated their paying customers.
I am an animal lover. I've been to many zoos and volunteered at many rescues. I would not return to the Austin zoo.