Zoo animal feed is a niche market taken to the extreme, but thanks to the efforts of the recently established European Zoo Nutrition Centre, it is a rapidly developing one. The first hurdle is to establish the requirements of the many different species kept captive in zoos, then to collect and collate the data to re-apply it back into the commercial business of zoos and conservation. Commercial feeds do exist for zoo animals, but the market does still appear to have room for expansion.
This article can also be found at Feed Mix, volume 11, no. 4