The owners of a nine-month-old puppy say he was gravely injured Monday after being attacked by a German shepherd at a dog park in North Battleford, Sask.

Lyle Kennedy posted a video of the attack to Facebook in the hopes of finding the German shepherd’s owner. He thought the larger dog’s owner had given him his contact phone number, but when he called the number, it was unlisted.

The attack was witnessed by Kennedy, his wife and their four children, who are between six and 11 years old.

X-rays show Finn, a Shih Tzu-Yorkie cross, suffered a severed spine, according to Kennedy. The puppy is partially paralyzed and can’t control his bowel movements.

Kennedy says the family may have to put Finn down if there are no surgical options for his injured spine.