I just had a look at Tripadvisor (Paradise Valley Springs Wildlife Park - Rotorua - Reviews of Paradise Valley Springs Wildlife Park - TripAdvisor) and I'm a bit surprised nanoboy that you singled out one comment as a reason to question whether visiting or not. I only looked at the first three pages of 78 comments but almost all of them were four or five stars out of five. The only bad comment was that one you picked out and even his general comment on the park wasn't a bad one.
I haven't been to Rotorua but I would definitely choose Rainbow over Paradise. I know you like animal encounters but really how common are lions?! They are everywhere! And the other animals there are llamas and wallabies and such-like critters. If you're coming all the way over to NZ visit a collection that isn't a repeat of numerous collections in Australia. Rainbow Springs all the way for the kiwi!nanoboy said:For argument sake, let's say that the lion encounter is not available and we had time to visit just one zoo, which is better: Paradise Valley Springs, or Rainbow Springs?