I would not be surprised if this happens in European zoos as well sometime in the coming years, especially when the remaining wild populations become more difficult to reach.... As long as there is no change on the demand side, things will only get worse....
More shocking news from the ( temporarily ? ) closed zoo .... : Bloemfontein Zoo Animals in Shocking Condition, Starving to Death - SAPeople - Your Worldwide South African Community
Per Permanently Closed! after 2 years of back and forth, The SPCA won and the animals were moved to the LionRock rehabilitation Program
Article about the closured zoo : Bloemfontein Zoo animals - some thriving, some dead, some mysteriously missing