Police say a female officer had pulled over a vehicle for speeding when she became suspicious of the occupants and called for backup.
One of three dogs in the suspect vehicle jumped through an open window and lunged at the second officer, biting him in the abdomen.
The officer shot the dog in the head. It ran away but was later tracked down and taken to a veterinary clinic.
The member who was bitten was wearing a protective vest and was uninjured.
The man and woman in the vehicle were taken into custody but no charges have been laid. The remaining two dogs are in the possession of animal services.
The Calgary police says its major crimes unit will investigate the incident.
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