TORONTO -- A Toronto woman hammered her 70-kilogram American Bulldog with a mop in a desperate bid to save her boyfriend after the dog tore off one of his testicles, police said Wednesday.

At 53 Division, Staff-Sgt. Glenn Gray said the 52-year-old victim was “feeding it some treats” the previous day when the three-year-old normally well-behaved large animal “bit him on the face and neck,” then sank its teeth into the struggling man’s groin.

During the attack in her apartment, Gray said the woman “beat the dog off with a mop.”

Another person was present, but was uninjured by the dog, who is called “Bully,” he said.

Paramedics were dispatched following a 911 call and took the badly bleeding dog-bite victim to a hospital, where police expected him to make a recovery.

He has a separate address from his girlfriend. Their names were not released.

Gray was unaware of the dog being investigated for any previous incidents.

He said Bully was turned over to the city’s animal control staff and will remain under quarantine for 10 days as the attack is investigated.

One of three types of stocky, heavy-chested American Bulldogs are called Bully, named after a breeder involved in their development from ranch and farm dogs. Considered confident, social, active and emotional, they often bond with owners and need a great deal of attention plus training.