This looks interesting, hadn't heard of it before - thanks!
Also in the Bay Area, I was able to feed a giraffe at the San Francisco Zoo, which was super exciting! Their tongues are really impressive, would recommend feeding a giraffe at some point.
It was a few years ago, but at least back then they had specific times listed online when you could watch the giraffes get fed. The key was to show up at a low traffic time to get a chance to interact.
(Disclaimer: no affiliation, I just enjoyed my visits there. I also have done no research into whether the animals are mistreated or anything.)