A large dog was stabbed with kitchen knives, tased, and shot before it stopped an attack on its owner and a police officer, only to get up and charge again before it was euthanized. The incident terrorized a quiet Boulder neighborhood Sunday morning.

Boulder Police released a short section of police-cruiser dash camera video of the attack which left its owner in the hospital with critical injuries. The video showed a neighbor apprehensively approaching the dog with long kitchen knives as the attack unfolded on a residential street.

When a Boulder police officer tased the dog, it turned on him and started chasing him up the street, the footage showed. The officer then shot the dog several times and began applying a tourniquet to the victim’s arms, only to be rushed by the dog a second time, according to police.

The family told Boulder police that the animal was an American Bulldog, but police are waiting to learn of its official breed from Colorado State University — where an necropsy is being performed.

The dog was later euthanized by Animal Protection officers. The owner/victim is in critical, but stable, condition at the hospital and doctors credited the officers’ quick thinking for saving the victim’s life by helping to stop the bleeding by applying a tourniquet to his arms.

The dog attack started Sunday morning inside of the dog-owner’s home and made its way outdoors as the owner held on to the animal to keep it from attacking anyone else, police said.

When BPD responded to the dog attack in the 3200 block of Palo Parkway at 8:17 a.m. Sunday, they found that a neighbor had stabbed it with kitchen knives as it was mauling its owner.

Animal Protection officers transported the dog to Colorado State University’s Veterinary Teaching Hospital for a necropsy to rule out rabies, a brain tumor, accidental toxin ingestion and other possible environmental causes for the attack.

“This was a disturbing event for everyone involved and the mauling could have truly been much worse if not for our officer’s swift actions,” interim Chief Stephen Redfearn said in a news release. “Though we all love our animals here in Boulder, this dog posed a life-threatening risk to the man he was actively attacking as well as the multiple community members nearby, and we ultimately had to protect those lives first.”

Redfearn said the family had owned the dog since it was a puppy, about eight years.

This story was written with the help of Gazette digital editor Jonathan Ingraham.