Video prompts investigation

It appears to show sheep being bound and slaughtered without being stunned first, and trying to escape with their heads partially removed.

‘‘We don’t know how many of these brutal and unsanitary illegal slaughterhouses operate in and around Melbourne,’’ Mr Meddick said last week.

He was handed the footage after an anonymous source provided it to vegan activists.

The animal rights group Aussie Farms previously came under fire for publishing the details and addresses of farms across the country.

PrimeSafe was contacted for comment.