The Whangarei District Council had been called and Mr Macken was hoping it would soon send someone to remove the pieces of chicken before they started reeking in the hot sun.
Mr McKay said the neighbour whom he had asked to be quieter was "a very nice woman".
But he suspected friends of her teenage children might be responsible for the chicken, considering putting it in letterboxes a prank.
The Advocate asked the neighbour, but she said she didn't know anything about it and had found pieces of chicken in her letterbox too.
The Manse St people had called Whangarei police, who didn't respond immediately. An officer later told the Advocate police had received no reports of a large amount of chicken going missing in the city.
The Advocate then heard a security firm was investigating chicken taken from the Regent New World a short distance along the street, but when the supermarket was called a duty manager, who asked not to be named, said he did not think it came from there.
Supermarket staff had heard about the incident and another duty manager had checked it out and concluded New World was not missing any chicken, he said.