Footage of NSW racehorse slaughter leaked

Ex-racehorses in NSW have been sent to knackeries for slaughter in potential contravention of the state's racing rules, footage released by an animal protection group shows.

Farm Transparency Project released footage of 12 identified thoroughbreds being sent for slaughter at Kankool Pet Foods south of Tamworth and Highland Pet Foods north of Armidale. Other unidentified racehorses were also slaughtered.

In NSW, horse owners are required to document where their horses go when they are retired from racing but problems arise when they are moved on, some several times.

Racing NSW prohibits horses from being sent to a knackery after they are retired.

One per cent of all racing prize money in NSW has been assigned to horse welfare since 2016.

Victorian upper house MP Andy Meddick, from the Animal Justice Party, told state parliament under privilege on Thursday that racehorses associated with Broombee Stud - owned by Harvey Norman executive chairman Gerry Harvey - were seen at Highland Pet Foods.

"They say they love their horses, yet they give them a bullet. While this is an interstate investigation, it is no different here in Victoria," Mr Meddick said.

AAP is seeking comment from Mr Harvey.

The release of the footage comes after an ABC report in October 2019 found hundreds and possibly thousands of healthy Australian racehorses are sent to the slaughterhouse each year.

The ABC also aired accusations of multiple instances of animal cruelty at slaughterhouses, including vision of workers at Queensland's Meramist abattoir tormenting horses before their death. Three people were in July charged over the incident.

The RSPCA estimates 4000 former Australian racehorses are slaughtered annually.

Slaughtering racehorses is not illegal in Australia.

Farm Transparency Project executive director Chris Delforce called on Racing NSW to guarantee a full investigation into the knackeries and labelled industry self-regulation a failure.

"Clearly the rule implemented by Racing NSW prohibiting this slaughter is nothing but a smokescreen designed to make them look good to the public while doing absolutely nothing to actually address this problem," Mr Delforce said in a statement on Thursday.

Racing NSW general manager of integrity Marc van Gestel on Friday confirmed to AAP in a statement the racing body had investigated the footage and only three of the identifiable horses may have been sent for slaughter in contravention of the rules.

"If Racing NSW's investigations establish that any of those horses remained in the ownership of persons under Racing NSW's jurisdiction (being NSW owners and licensed persons), Racing NSW will prosecute those persons for any breaches of its rules," Mr van Gestel said.

He also said Racing NSW was lobbying the state government to criminalise sending thoroughbreds to knackeries, even if they have already been rehomed.

The footage also revealed other instances of alleged animal cruelty at Kankool Pet Foods, including a pig being shot 10 times and multiple animals being simultaneously placed in a "knockbox".