I haven't seen the fence, only was going on info in the news here but someone they were interviewing mentioned that the facilities had been upgraded at some point to make viewing more natural looking without looking at the animals in cages as was pretty common years ago, lots of zoos have these types of enclosures these days where you're elevated above the animals, the types of fences used normally wouldn't allow a foothold to be able to scale them, what they use here at least although our country has turned into a nanny state where there are so many rules and regulations around this kind of thing, I don't know if that's typical thinking in other zoos, I guess there's a fair amount of effort made with these designs to stop animals getting out, perhaps there's some expectation that we won't try getting in