Hamilton is up against current title holder Whanganui for this year’s most beautiful city award.
Five addresses were targeted across three towns.
The show was scheduled to be held from October 30 to November 1.
WorkSafe has been advised.
"A large rook population can completely destroy entire paddocks."
Some victims said the odour was "nauseating".
"They don't seem to think our health is worth anything."
Excessive grass cover can lead to problems with milk production and animal health.
Having only recently escaped drought, a mild winter on the Hauraki Plains is now creating a different challenge for farmers: grass staggers.