Dozens of dogs, some of which were believed to have been used for fighting, have been seized after RSPCA inspectors and police executed warrants at four Queensland properties.
An RSPCA spokesman called it "the first major breakthrough in 10 years".
"In the past week, a property near Richmond in western Queensland, two in Logan, and one in the Redlands were raided and numerous dogs, believed to be used for fighting, were seized," spokesman Michael Beatty said.
A number of other dogs were also taken from the properties due to welfare concerns.
Mr Beatty said a total of 56 dogs were now in the care of the RSPCA.
"A lot of them had quite extensive scarring, particularly on their faces and front legs ... and there was some dog fighting paraphernalia confiscated as well, treadmills, breaking sticks and the like," he said.
The raids were carried out after an extensive task force investigation into alleged dog fighting rings.
Investigations are ongoing.
