Three dogs have died from eating toxic karaka tree berries this week, prompting a warning from a senior vet.
Veterinary Specialist Group's Dr Mark Robson said they had seen three dogs poisoned by the berries this week.
"It's the time of year when the berries are at their ripest which means they are highly attractive to dogs".
And this year appeared to be "particularly bad for toxicity", Robson said.
"The berries ripen and fall at this time of year, and the toxin levels vary for reasons we don't understand.