I know that initially there was a lot of misunderstanding by zoos and the zoological community about the dietary requirements and ecology of the species in the wild. Zoos were feeding them diets heavy on meat content which was drastically shortening their lifespans through them developing kidney and liver health problems like bladder stones. In the wild over 50 % of their diet is fruits and mainly lobeira so around the 1970's zoos started feeding them more fruits and vegetables which seems to reduce health problems. Also they are prone to being parasitized by a giant kidney worm which causes scarring to the liver resulting in eventual death. The hypothesis was / is that the maned wolf requires the tannins in the lobeira fruit to fight off parasite infections and because these compounds effectively kill kidney worms.There is a paper written by zoologists at Sao Paulo zoo in the late 60's describing how the inclusion of lobeira in captive wolves diets virtually stopped these kinds of parasite infections (da Silveira, 1969). But a lot of zoos now ( due to difficulties in growing the plant, veterinary advances in medication and treatments and dietary analogues to the fruit) to the best of my knowledge no longer actively go about feeding their captive maned wolves lobeira fruit. If nothing else it could be an interesting experiment and if it is possible to grow this plant in glasshouses in ex-situ captive populations abroad it could somewhat help with the nutrition , wellbeing, and enrichment of the maned wolf.