Burning cowpats proved problematic at a large grass fire in Te Hauke, south of Hastings.
Three helicopters assisted Hastings District Council rural fire officers and Otane fire service to extinguish the blaze on Colin White Rd, near SH2, on Monday.
The fire, which started about 3pm, destroyed 5ha of deferred grazing - long grass held over from winter.
Hastings District Council principal rural fire officer Trevor Mitchell said the fire was not suspicious but the exact cause had yet to be determined.
The farmer moved his stock with the assistance of neighbours while the four-hour battle ensued.