I dont know if you had any personal restrictions, kids, time etc, but sometimes you just have to leave an enclosure and return a couple of times. I love Chester zoo as it's so big, but not sparse; there's always something to see on the way to another section. Cheetahs might be your favourite animal and grabbing anything might be satisfactory on a personal level, but you have to see how other people will view it (and I dont mean family and friends) if you're looking for a response on a forum.
There are only a handful of regular people commenting on the Zoo forum (as far as I can see) these days, but putting an obvious zoo photo in the wild and free section isn't going to encourage positive feedback. I've been sorting some photos out for a friend to look at that I know would get heavily criticised on the forum, but my friend will enjoy them as an animal lover; i've got hundreds unprocessed that I can see would need work to even be acknowledged here, but I just post some of the better ones.
It's disappointing when animals don't 'perform' or the light is crap, or some brat get's in the way, or a smear happens to be on the window exactly where you don't want it to be, or, or, or ... that's the challenge, the fun of it. There are animal lovers on the forum who don't like zoos, so you wont see them commenting in that section regardless of how 'natural' the image looks and how well the poster has managed to overcome the challenges of enclosures. There are people who only comment on a thread because they have been to that particular zoo and leave nothing on threads containing better photos. There are some that comment on what they perceive to be an captive animal's state of mind, without knowing anything about the subject and saying nothing about the photo itself.
It's a photo forum and your photo is in the wrong section and does not create the impression you wish it to. Get back over there (are you a member of the zoo?) and try again