Don't forget there are more zoos that would like rhinos than just 3 open range zoos ,we have a host of regional zoos now that are more than likely love to have them, also Australia Zoo may need new animals and have the room to do so.
Absolutely. Hamilton Zoo have ceased breeding due to the representation of their rhinos and Auckland Zoo have a family group, where both young females are the daughters of the only bull in the herd. There’ll be endless potential for shift arounds, which will no doubt stimulate some underperforming herds to breed. A new bull is often enough to resume cycling in some cows.