Vancouver radio station CKNW said documents from WorkSafeBC, the provincial occupational health agency, show an employee of Outdoor Adventures Whistler got compensation for post-traumatic stress disorder after allegedly being made to kill the dogs.
The radio station reported the dogs were shot or had their throats cut, and were buried in a mass grave.
"It wasn't always a clean, one-shot kill," said Corey Steinberg, attorney for the employee. "Inevitably, he ended up seeing and having to put the end to some horrific scenes."
CKNW says Outdoor Adventures Whistler has not contested the injury claim but will not comment.
Marcy Moriarty, head of cruelty investigations at the British Columbia Society for the Prevention of Cruelty to Animals, told the station her organization is investigating.