Whangarei SPCA's Francine Shields is on a hunger strike because she is sick of seeing dogs in the region starve to death.
While the measure may sound extreme, Ms Shields said it was necessary to highlight the issue, especially after a spate of severe emaciation cases last month.
"I think it comes out of frustration more than anything," she said. "I thought 'I really do have to get the word out there'."
People need to report if they see an animal they are concerned about and owners should seek help early if they are struggling to feed their animals, Ms Shields said.
The three-day hunger strike started yesterday but was sparked by the record number of dogs picked up last month by Whangarei SPCA inspectors, she said.