A HERD of alpacas was attacked and killed at a Henley Brook property by dogs last Wednesday.
Four alpacas were found dead and a fifth had to be put down after being mauled by two domestic dogs.
City of Swan acting chief executive Colin Cameron said the City was investigating the attack.
“The dogs alleged to have been involved in the attack have been identified and the owners are being co-operative,” Mr Cameron said.
“An inspection has occurred to ensure these dogs are adequately secured.”
Swan Valley and Gidgegannup ward councillor Darryl Trease said the problem was ongoing.
“We’re having a few issues with domesticated dogs in urban fringe areas,” he said.
“And as houses get closer to the Swan Valley, it will become more of a problem.
“Once dogs get the taste of blood, that’s it.”
Mr Cameron said the City was not able to comment on what action would be taken as the investigation was still underway, but he said fines could be as high as $10,000.
“All evidence collected will be considered,” he said.
“Depending upon the circumstances, under the Dog Act 1976 the City has options available ranging from issuing an infringement notice with a modified penalty of $400 to commencing a court prosecution where a fine up to $10,000 could be imposed.”
He said it was important owners kept dogs leashed when outside their property, never allowed dogs to wander unsupervised, and ensure their properties had appropriate and secure fencing.