"It is devastating that all this good work is undone by an irresponsible dog owner. But worse that a poor kiwi has met a horrible, preventable death.
"The protected area is producing kiwi that disperse into neighbouring areas, so more of us can have kiwi in our backyards," she added.
Dogs were the main cause of death of adult kiwi, and unfortunately attacks were all too common in Northland.
"Unless we get all dog owners to always make sure their dogs are locked up every night and under control when let out, we will continue to get these horrific deaths and kiwi numbers will dwindle," she said.
"It is bad enough that most chicks are killed by predators, but to lose adult kiwi due to people's irresponsible behaviour is more devastating, and much worse for the population. Kiwi should be living and breeding for 30-40 years, not three.
"Any dog can kill a kiwi. While pig hunting dogs usually get blamed for most kiwi deaths, many are killed by pets, especially as land is subdivided and more people with pets move into kiwi habitat. Knowing kiwi are present is important, but controlling your dog at all times will keep all wildlife safe."
Simple things every dog owner in a kiwi habitat area could (and should) do included confining them at night (dogs on chains had killed kiwi), keeping them on a short lead when in a kiwi area, use easily obtained muzzles to prevent a dog biting a kiwi, learning the signs of kiwi presence and where they are likely to be, having a well-fenced enclosure that dogs can run in but kiwi cannot get into, having an obedient dog, and ensuring that visitors with dogs know the rules.