But the general opprobrium lumped on farmers is a little unfair. They want — and need — a healthy environment and, alongside earning those export dollars, have done a lot of work to alleviate that "dirty dairying" image.
Dairy NZ has this week also jumped on the PR bandwagon, announcing plans to help clean up rivers.
The crunch is likely to come, though, with the choice of strategy to achieve this desired result.
The environmental lobby cuts to the chase, saying we have to have fewer cows, the national dairy herd having rocketed over the past 20 years. That could be a tough pill for farmes to swallow and may have Fonterra's number-crunchers in a tizzy.
And deciding on the optimum number of cows is a bit like deciding the optimum number of immigrants — it's a moveable feast contingent on guesswork and prejudice.
Expect more cream pies being thrown as the PR battle intensifies.