The veterinary investigation into the recent deaths of the four White Rhinos is still underway.
The surviving female appears to be improving. Although she is still showing some symptoms they are less frequent and the zoo is continuing to monitor her along with the other two male White Rhinos, which remain healthy.
The female White Rhino is being actively treated with medications aimed at maximising her chances of a complete recovery.
Whilst this complex investigation has ruled out a number of causes the zoo is still awaiting more test results but these take some time.
Vets leading the investigation are hopeful that in the next couple of weeks they will have all test results returned however as with all complex veterinary investigations there is the possibility that these results may be inconclusive.