We just left the SD Zoo and we were extremely happy with it. Once you realize that it has been at this spot since 1916, where it has come is truly amazing. That is not to say it is aged at all. It is a very modern Zoo and museum.
We would highly recommend the SD Zoo over other souther California attractions including SeaWorld and Disneyland. Skip them and come here.
The staff were great and it was evident they loved their jobs. The Bird show was fun and funny. This is a fit person's park as you will get exercise with the hills. It was good with us!
The only downside we could see was the cost for soda. $4.19 for a soda? Wow, that is WAY over priced.