I had a very interesting chat with Benjamin Mee about this puma a couple of months ago.
The puma came from another UK collection - I think Cromer, but I can't really remember, and therefore was not in quarantine (either for Dartmoor or for Exmoor).
Benjamin wanted a puma, as he believes there are many wild pumas still in the area. He planned on building a "state of the art" "double-decker" puma enclosure, with the zoo's puma on the upper level and would lure wild pumas into the lower level enclosure and trap them.
(Un)fortunately the zoo cannot afford to build this crazy contraption and the poor animal spent a very long time in an inadequate off-show enclosure before being sent to the delightful Exmoor Zoo, where it can be cared for properly.