The dogs thought to have killed three cats and a dog in vicious attacks in Rotorua have yet to be caught.
Some Hillcrest residents and pet owners feared a child might be next after three cats, one dog and a guinea pig were killed by dog attacks last month.
Animal Control team lead Dylan Wright said a dog had been impounded as part of the investigation into the attacks in the area.
"An identification process was carried out with two attack witnesses, however neither were able to positively identify the dog," Wright said.
Wright said officers also carried out a search at the dog owner's property as witnesses of the attacks had reported seeing two dogs.