A march calling for ratepayer funding of Zion Wildlife Gardens is being planned for next week.
Former Zion employee Bridgette Henare-Winiata, who was made redundant in 2010, is organising the event.
"To have the park fall to pieces with threats of euthanasia is absolutely devastating," she told the Northern Advocate.
"I won't let that happen. The Busch family need to really sit down and sort out their problems."
The march will take place next Friday, beginning at the Whangarei courthouse at midday.
Rabobank has confirmed the receivers are moving forward with plans to sell the park, with the wildlife, to an interested purchaser and a conditional contract is now in place.
Rabobank general manager New Zealand, Ben Russell, said last week the receivers are acting to ensure the wildlife park is sold as a going concern.
Russell said there has never been any intention to euthanise any of the animals at Zion Wildlife Gardens.
"The welfare of the wildlife is a priority - they are being very well cared for and the planned sale of the park would enable them to remain in place," he said.