A senior Kapiti Coast District Council animal control officer needed medical treatment after being stung by wasps dozens of times.
The incident happened last week after about three wasp nests were disturbed while a group of 19 stray cows were being led to a safe area.
Council community services group manager Tamsin Evans said two staff members were driving in a work utility along Arawhata Rd when they were notified of cows loose in Rata Rd.
"They phoned another animal control officer and agreed to meet up on the corner of Rata Rd and Manawa Ave.
"They knew the farmer so rang him to ask which paddock to put the cows back into."