Ian,
Your spending a lot of time around zoo's and private animal collections.
Have you got contacts with someone?
This makes a good habitat shot, but it needs a little work IMO.
When I take shots like this, I try to hide the fact that the animal is in a captive enclosure.
Some times its difficult to hide all of the artifacts that might be caught when you fire the shutter, but one way to beat it is to get a tight crop on the subject.
I think this shot would be better suited as a portrait.
Crop tight as to exclude as much of the background as possible.
Keep the Leapards eyes on the vertical thirds and you could be onto a winner.
Can't fault the exposure and sharpness.