Tripe said lengthy negotiations would take place between banks and dairy borrowers, but lenders would try hard to avoid forced sales of distressed farms, as that process could end up being "quite messy".
"It's really a matter of managing the process ... this process has barely begun, " he said.
Dairy land prices had held steady so far, Tripe added, but a fall in land values "would cause a bit more of a problem".
Ross Verry, general manager of agri at ANZ, New Zealand's largest rural lender, said that while the latest cut to Fonterra's forecast wasn't a surprise, it would add to the financial pressure facing many farms.
The bank had already seen a lift in the number of stressed rural customers, Verry said.
"There will definitely be some businesses that don't survive."
However, Verry said many dairy operators were making good progress in reducing costs and increasing efficiencies.
A Westpac spokesman said the bank was well-positioned to work with its rural customers through the dairy cycle.