Animal control is working to find two dogs thought to be responsible for the deaths of 35 sheep in the Poraiti area in the past few days.
Napier City Council regulatory manager Michael Webster said his team were working to locate the dogs and put a stop to the killings "as fast as humanly possible".
"The officers are working pretty hard on this one. We know of 35 sheep that have been killed - that's a lot. Another five have sustained serious injuries."
The dogs are described as both medium sized, one black and tan with short hair and a studded collar, and one white and gold.
The dogs have been seen roaming in the Poraiti area over the past few weeks.