To be quite honest I feel like transferring Chai and Bamboo to OKC was a mistake. Now this is complete conjecture, of course, but I wouldn't be surprised if Malee would have still been alive if Chai and Bamboo were not transferred to OKC.
Now of course Chai probably would have passed away no matter where she went, but I feel like OKC got a bit greedy. They already had Asha and Chandra, both young females and one a proven breeder, and Asha's calves Malee and Achara, both of whom could breed in the future, and their big bull Rex to breed with all except for Achara. Even Kandula was a wise choice to breed with Achara and the other females, but did they really need two post reproductive females as well? Especially ones that we know host EEHV. Honestly, I don't really think so. I realise they have an excellent new exhibit, but I think passing Chai and Bamboo by and opting to work more on breeding their existing herd would have been a wise idea. There many many other excellent zoos that I am certain would have been thrilled to acquire Chai and Bamboo.