OSLO - Dogs in different parts of Norway have been hit by a mystery disease in the past few weeks, and officials are scrambling to identify the cause.
At least a dozen cases have been reported, according to the Norwegian Food Safety Authority.
Autopsies provided a new clue on Monday: two bacteria have been found in "abnormally large quantities" in multiple dogs that had died, according to the Norwegian Veterinary Institute.
The Food Safety Authority, Veterinary Institute, and the Norwegian University of Life Sciences are working together on the investigation.
Apart from bacteria, possible causes might include viruses, fungi, parasites, or even environmental causes like poor water quality, said the Veterinary Institute.