Bruce Slayter, who has about 500 sheep on his property, made the gruesome discovery of his dead livestock after the attack, which occurred sometime on July 14 or 15.
‘This happens every year, though last year only three were killed,’ he said.
‘The only way to keep dogs out is to install dog- proof fences, but my property is about 80ha, so that would be several kilometres of fencing at a cost of about $50,000.
‘I hope people with dogs remember that their instinct is to hunt and kill and you cannot train it out of them.’
Shire of Mundaring chief executive Jonathan Throssell said the level of dog containment was ‘unacceptable’ and put the community at risk.
More than 55 livestock deaths have been reported in the shire this year.
Mr Throssell said the attacks were causing community angst. ‘What is worse is that there have been numerous attacks in the past few months where investigations by rangers found that the owner was aware the dogs were roaming,’ he said.
Mr Throssell said neighbours had a social responsibility to report repeat wandering dogs.
For more information about the issue call Community Safety Rangers on 9290 6629.