The investigation began 18 months ago when the owner of an animal shelter reported to authorities she suspected a company that disposes of animal remains was instead using the carcasses for meat.
Think Spain said the woman, Olga Costa, of Ponteverda, Spain, said she heard from a woman whose pet was put to sleep that she went to the company's headquarters in an attempt to say a final goodbye to her pet and found workers deboning dog carcasses.
Dutch officials said the investigation traced the dog meat to a distributor in Amsterdam. The suspected tainted meat has been sent for DNA samples to confirm its origin.
Notable deaths of 2014 [PHOTOS]