I've seen predator-prey shared exhibits in various places. One very famous for New Yorkers would be the Malagasy cichlids with Nile crocodiles at Bronx. The most striking example (uploaded in the gallery too) is in my local aquarium, where they kept a Yellow anaconda with brown basilisks, tucan fish, and Pallas's long-tongued bats.
There is a specific thread for these kind of exhibits somewhere in the forum. The most shocking one that I've readed is lions with meerkats (of course it didn't ended well).
I think that keeping a predator fully satisfied always, plus being in company of their prey since newborn but never fed with alive or even unprocessed prey, sometimes can work. I remember many years ago a shop that had in the window a cat with two canaries, all of them sleeping together.
