The partner of a leading greyhound trainer who told the ABC's 7.30 the ban on racing in New South Wales was caused by "a very small minority" has been repeatedly disqualified over the discovery of banned substances in her dogs, including cocaine and steroids.

Key points: Greyhound trainer Jodie Lord was disqualified three times over discovery of prohibited substances in her dogs

Greyhound trainer Jodie Lord was disqualified three times over discovery of prohibited substances in her dogs Currently serving disqualification after test found anti-anxiety drug oxydiazepam in one of her greyhounds

Currently serving disqualification after test found anti-anxiety drug oxydiazepam in one of her greyhounds Her husband Andy Lord said NSW ban was due to small minority doing things wrong

Industry heavyweight Andy Lord said on Thursday night he was being unfairly punished by NSW Premier Mike Baird's shock decision to ban greyhound racing by July 2017 because the industry had failed to police itself.

"The industry body could have done more," said Mr Lord, who owns one of Australia's biggest training and breeding facilities at Gunning north of Canberra.

"A very small minority of people did things wrong because they thought they could get away with it. If they thought they could get away with it, obviously the right checks weren't being done."

The Premier announced the ban after a special commission of inquiry found overwhelming evidence of animal cruelty, including mass greyhound killings, widespread live baiting and deliberate under-reporting by Greyhound Racing NSW of the number of dog deaths and injuries.

Andy Lord told 7.30 neither he nor his family had engaged in animal cruelty.

Jodie Lord's history of disqualification

Greyhound Racing NSW records show his wife Jodie Lord, a veteran trainer, was disqualified three times since 2005 over the discovery of prohibited substances in her greyhounds.

Ms Lord and 178 other trainers have also been charged recently by Greyhound Racing NSW with the unauthorised export of dogs to Macau, where healthy Australian dogs languish in shocking conditions and are brutally slaughtered.

Jodie Lord is currently serving an 18-week disqualification after a drug test found the banned anti-anxiety medication oxydiazepam in one of her dogs in 2015.

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She was disqualified from greyhound racing for 18 months in 2005 after cocaine was discovered in one of her dogs.

Within six months of returning to the industry in 2009, she was disqualified again for four months over the discovery of a prohibited steroid, dexamethasone, in a greyhound that was kept on her husband's property.

Two recent investigations by Greyhound Racing NSW also found Ms Lord "displayed poor husbandry practices".

Andy Lord told 7.30 his wife maintained her innocence on the charge of exporting dogs to Macau and he was facing no allegations of wrongdoing.

"I haven't exported any dogs to Macau and I don't know any of my dogs that have ended up in Macau," he said.

"I don't know anybody who's been involved in live baiting personally.

"I've never engaged in live baiting or put down dogs that weren't fast enough."

The NSW inquiry into greyhound racing was sparked by a 2015 Four Corners expose which showed top trainers and breeders engaging in live baiting in three states.

Andy and Jodie Lord are industry heavyweights. Andy Lord has been training dogs since the age of 15, while Jodie Lord has trained greyhounds for more than 30 years.

Editor's note (12/07/16): A previous version of this article incorrectly stated that Jodie Lord had been found to have administered banned substances to greyhounds. The ABC wishes to clarify that at no stage has Ms Lord been found guilty of doping or administering banned substances to dogs in her care. The ABC apologises for the error.