I fully agree with Peter on the conservation part here.
Regarding the photograph, I like how you framed in on the sad expression....but it looks like you went a bit too far in the post-processing....you might want to cut back on the noise-reduction (I assume you used it).
I agree whole heartedly with Peter and Al. Although we are members of our local zoological society with an excellent local zoo, after three trips to Kenya, we no longer visit our local zoo. It is too distressing to see the animals in captivity. However we fully understand the benefit that zoos provide. Whether it is to maintain the gene pool, captive breeding or just so that people who have not had the benefit of witnessing these incredible creatures in their natural habitat, can observe them. Therefor we continue to support it financially, but it's no longer comfortable going to visit. - John
All other issues aside here, I really feel bad for him. Jose did a great job making me feel for him with this image and is that not what he want most from any image, to feel the emotion.