British Columbia:
One hundred dogs were shot dead over two days in Canada, allegedly because an adventure company did not receive the boost it expected after the 2010 Winter Olympics.
The dogs killed were part of the company's dog-sledding events.
Most died instantly, but others suffered, with one running away badly injured before being killed.
The gruesome event was described in documents awarding compensation to a worker at Outdoor Adventures Whistler, who claimed post-traumatic stress disorder for having to shoot the dogs after bookings dropped sharply for a tour operator following the 2010 Winter Olympics.
"He's shot a dog in the head, half of his (the dog's) head's missing, and the dog's running around still alive," said Marcie Moriarty, general manager of cruelty investigations for the British Columbia Society for the Prevention of Cruelty to Animals (SPCA).
Both the British Columbia SPCA and the Royal Canadian Mounted Police are now investigating the slaughter.
Documents reveal bookings for dog sled tours collapsed after the Olympics, and when the company could not find homes for its animals, it ordered the mass shooting.
The dogs, which were part of a pack of 300, were shot over two days last April.
Following revelations of the slaughter, the Vancouver Humane Society on Monday called for a ban on the sled-dog tour business.