A Perth police officer who shot a pet dog in Kinross last mont was justified in his use of force, a review into the incident has found.

A WA Police investigation into the incident found the officer discharged his weapon based on reports of the dog's aggressive behaviour in the area for approximately two hours prior to the shooting on November 2.

"In that time, the dog had attacked another dog and displayed a range of menacing behaviours towards a number of people in the neighbourhood," a WA Police spokesperson said on Wednesday.

"The first police officers to respond to calls for assistance from the public were also subjected to aggressive acts by the dog.