It's not really the zoo's fault, just horrible
luck.
Melbourne has lost two elephant calves from five, whilst Taronga have lost two from 6. Ongard and Pathi Harn's births weren't exactly smooth as well, with a lot of complications. Then, they've been unsuccessful with breeding Tang Mo as well as Permai at Perth, and to a lesser extent-Anjalee at Auckland.
If there was one little criticism of the bredding program, it would be of Melbourne's in recent times. They haven't had a calf born in over 4 years. Kulab (2000) is now over 10 years since she last gave birth, Dokkon (1993) meanwhile has had almost a seven year gap since she last gave birth, and Num-oi (2001) has gave birth twice but both of the calves unfortunately are deceased.
Their breeding bull, Bong Su died three years ago, but I don't know why they haven't tried AI with Putra Mas. I'm mostly worried about Kulab ever successfully breeding again. Melbourne can't afford to wait until the they move to WORZ, because by that time Kulab could be about 28, and hasn't breed in 18 years. Dokkon who will then be 35, and Num-oi (27) could be in some dire circumstances as well.