Not to further derail this thread, but this is something that I wanted to comment on, briefly. Even if it was possible to source more Jentink's (which it's really not, currently), there is not enough space in zoos, at least in the United States, for them to become well-established and sustainable. Like all duikers, Jentink's duikers would be pair-held species. Something that has proven to become quite an issue with the yellow-backed program is that when breeding recommendations suggest forming new pairs, by the time it is all said and done, you are looking at losing, on average, three years of an animal's life that it could be breeding. For a relatively short-lived animal, that is a lot of wasted time. Duiker are notoriously fractious and spook easily, so in most cases, their husbandry is not easy, let alone their transport between facilities. Also being a paired species, it is not always easy to place offspring, so breeding facilities need to be able to house any offspring they produce for upwards of three years. The AZA is currently recommending yellow-backed duikers be a consortium species, where are few facilities are designated breeding facilities with multiple pairs, and offspring are distributed from there to cut down on all of the above issues