Brigadier Leonard Hlathi said most of the suspects fled the scene, leaving only the lawyer and his father behind.
"The three trucks, a bakkie that the legal practitioner and his father had been using, as well as cash to the tune of R95,000 found in the suspects' possession, were seized by police," he said.
Following the pair's arrest, leads were followed and 10 other men, believed to be the suppliers who had fled the scene, were nabbed.
All the suspects will appear in court soon to face charges of livestock theft and possession of stolen property.
"The initial probe established that it was not for the first time that the community around Breyten suffered a big blow by losing cattle to thieves in the area," added Hlathi.