A runaway dog is believed to be responsible for killing more than 50 lambs and maiming many more on a Maheno farm over the past month.
In desperation, farmer Doug Brown has installed thermal cameras on his property, which have captured an image of the dog, which is of an unknown mixed breed.
It is tan with black markings on its face and neck.
Waitaki District Council senior compliance officer Tristan Hope said the dog's identity had not been confirmed but it was suspected to be a dog that had become feral after it escaped from its owner several months ago.
Brown said the dog's owner had unsuccessfully attempted to catch it.