Inspectors from the NSW RSPCA have uncovered a shallow grave containing the bodies of several dogs at a property in western Sydney.
Nine deceased greyhounds were discovered at the Marsden Park address of a licensed and registered trainer along with a further 12 severely emaciated greyhounds.
The surviving dogs were seized by the RSPCA and have been taken for treatment for a number of conditions including severe dental disease, internal parasites, fleas and pressure sores.
All had been bred for the greyhound racing industry.
NSW RSPCA chief inspector Andrew Clachers told 9News that despite the "horrific" scene, the surviving animals continued to show affection towards inspectors.
"It was quite heartbreaking seeing these gentle dogs in that state," he said. "One dog was nuzzling into handlers and enjoying some soft contact."
Clachers also confirmed that, once medically fit, the RSPCA would be rehoming the dogs.
The trainer is now being investigated for alleged serious animal cruelty offences.