Fonterra helped them too, operating a deferred payment system that means some of the high milk powder price of 2013/14 was paid out in 2014-15, keeping their payment well above the $5/kg break-even level. It meant that producers did not really feel the pinch until last season, the second year of the slump when the market price sank to $3.90/kg.
At the last auction of 2016 the price had doubled since the beginning of the year and Fonterra has raised its farmgate payment to $6/kg. Before this season has ended it could be up to $6.50.
In this way New Zealand's dairy industry, the world's largest exporter of a commodity not heavily traded internationally, has outlasted its rivals who are heavily subsidised.
It credits its survival to the economics of pasture grazing, which will not please environmentalists monitoring rivers and streams. Cattle effluent is putting too much nitrogen into waterways, and responsible farmers are taking steps to reduce it, but further dairy conversions would seem unwise.
For economic reasons as well as environmental, farmers must be wondering if too much has been invested in dairy. Prices in a thinly traded commodity are bound to be volatile and farms need their eggs in more than one basket. They have come through this slump stoically, but how many want to do it again?