There is currently a show on Animal Planet hosted by Forest Gallante called:
Vantara tales from the sanctuary. I know there is a lot of controversy about how at least
some of the animals have been accumulated (perhaps even illegally) but there does not
appear to be any doubt they are receiving a high degree of care and resources. One stat that completely floored me was they said that they had 7 kitchens and 300 staff in those 7 kitchens to service the animals. That is more than most Zoos have staff total! I may have misheard but they said they process 25 tons of food per day, but that doesn't seem to make sense as they would need something like 40 tons per day just to feed their 200 elephants. Maybe that doesn't include
fodder like hay or browse.
They have not mentioned any breeding success, though they have off hand mentioned breeding programs.