Officers went to a house in Hassell St, Parramatta, over another incident about 10.40am on Friday.
While they were speaking to the woman, her pit bull became aggressive and bit her on the arm, they said.
Police then stunned the dog with a taser and restrained it in a room in the house.
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| Authorities with the pit bull that had attacked its owner |
Council inspectors have arrived at the scene.
The woman was taken to Westmead Hospital for treatment for minor injuries to her arm and another man was seen bleeding from the head as a result of the earlier assault.
The attack comes after a 10-year-old girl and three adults were bitten by two brown pit bulls outside a Sydney shopping centre on Thursday night.
All were treated at hospital.
Police believe the dogs broke free after a man tied them up and went inside a shopping centre in Fairfield West on Thursday night.
He returned a short time later and left after regaining control of the dogs.
He is still being sought by police.
(Daily Telegraph - June 17, 2011)
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