That's definitely something I've noticed with giant anteaters in other zoos, it's been a very long time since I've actually seen one. This is the third time I've been to a zoo that has them, but haven't been able to spot them anywhere.
Other than skipping Islands, the most disappointing thing about my visit is not getting a photo of Napo in Spirit of the Jaguar (my visit was a few days after the blak Goshi died). As I entered the indoor viewing area the Napo was sitting on the rock close to the first window in a nice photogenic pose, but as I was getting my phone out of my pocket he ran off into the foliage, and I didn't see him again for the rest of the visit. Despite that, Spirit of the Jaguar is a great exhibit, I like the ceiling rope set-up for the sloth (but I do wonder if the sloth has ever lost its grip and fell in the fish tank), and it was the first time I've ever seen bush dogs.