An employee of Canada's Outdoor Adventures company admitted to slaughtering 100 sled dogs, according to a workers compensation report he later filed.

The employee - whose name authorities have not yet released - worked as a general manager of Howling Dogs tour company in Whistler, British Columbia. He claimed he was suffering from post-traumatic stress after carrying out company orders to kill the dogs, the report said.

A company with the same name, Howling Dogs Tours in Canmore, Alberta, has no connection with this case.

The man cited "a slow winter season" that compelled him to decrease the size of the company's dog pack by 30 percent, the report said.

The slaughter took place over the course of two days in April 2010, when he allegedly shot and knifed the animals before dumping them into a mass grave, including at least one dog that was later found alive, the report said.