Advocacy organisation Animal Liberation Tasmania on Thursday published anonymously sourced footage purporting to show Anthony Bullock's facility at Exeter, north of Launceston, in July.
In the footage, some greyhounds appeared to be kept in freezing conditions in sparse tin sheds without coats or blankets, the organisation said.
Some appeared to have no bedding, while others had shredded paper to sleep on.
What appeared to be animal cages or traps were seen on the property.
One horse looked to be in poor condition, while a ute on the property was loaded with horse bones, skins and a head, alongside a dead pademelon, the organisation said.
The footage showed another two dead pademelons at the rear of what appeared to be training runs.
Animal Liberation Tasmania spokeswoman Kristy Alger said the apparently dilapidated infrastructure, unclean conditions, lack of appropriate shelter and rubbish at Mr Bullock's facility appeared to have been overlooked by authorities.
"The presence of deceased pademelons and cages must be thoroughly investigated, especially given comments made by Kristie Johnston MP that whistleblowers are too afraid to come forward with evidence of live baiting in the greyhound industry," Ms Alger said.
"The reality is whenever animals are exploited for money, they always come last."
Tasracing chief executive Andrew Jenkins confirmed that the Office of Racing Integrity on Thursday morning launched an investigation at the site.
He said Tasracing would wait to see how the probe panned out before it considered any further action.
The Office of Racing Integrity sits within the Department of Natural Resources and Environment, and is separate to Tasracing.
"Tasracing is strongly committed to ensuring the best animal welfare outcomes for our animals," Mr Jenkins said.
"If there are instances of mistreatment that are confirmed within our industry, there is simply no room for that."
He said Tasracing was open to a greyhound code of practice, and the body was consulting with its chief veterinary and animal welfare officer about the footage.
Former racing minister Madeleine Ogilvie, who was recently shuffled to the Women and Prevention of Family Violence portfolio, described the images as concerning.
She said animal welfare had to be front and centre.
"The majority of people in the racing sector are great people," Ms Ogilvie said.
"They do the right thing, and a small minority of people may do the wrong thing.
"That's difficult and we need to address those issues."
Mr Bullock was contacted for comment.
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