The illegal practice of allowing live animals to be killed by greyhounds as part of their racing training is still occurring in NSW, according to evidence that has been given at a parliamentary inquiry into the state of the industry.

Revelations about the barbaric activity have included details about the use of guinea pigs, rabbits, chickens, kittens and possums which have had their claws and teeth removed so they can't hurt the dogs, being used as ''bait'' and being mauled to death in training sessions.

Preparation concerns: A Thursday night race meet at Dapto Greyhound Racing Club. Credit:James Brickwood

''I have been told 'anything that squeals will do','' an industry stakeholder whose identity has been suppressed said in a written submission to the upper house inquiry.

TV vet Dr Robert Zammit has backed up the claims in his evidence before the inquiry and RSPCA NSW chief inspector David O'Shannessy said they had also received anonymous complaints but so far they had been unable to substantiate the claims. He encouraged people to come forward with information.