It would be interesting to know what the holding capacity at billabong is for snow leopards. Hopefully if they have the room they could import a pair and breed. The property itself is a decent size of memory.
They've held at least four at one point I think - their current two males (Khumbu and Sabu), plus Samarra (ex-Taronga breeding female) and Sabu's littermate Kemala, although I don't think all those animals were held singly. Theoretically there would be capacity to breed, although there would be limited capacity in terms of housing cubs long-term, unless they can stay at Billabong.
That’s correct that they’ve previously held 2.2 adults:
0.1 Samara (2001) Imported 2003
1.0 Khumbu (2003) Mangar x Lena
1.0 Sabu (2005) Leon x Samara
0.1 Kemala (2005) Leon x Samara
I believe Sabu and Kemala (litter mates) were held together; while Khumbu and Samara were held separately. Sabu and Kemala were removed from the breeding programme due to an eye condition. This may have come from Leon as his daughter at Melbourne was similarly designated non-breeding.