The room had a bed and a wardrobe in it, said Warrant Officer Malebo Khosana.
The woman was questioned about why the 12 sheep were there and she failed to give an explanation.
“She was arrested and the sheep were confiscated by the police,” Khosana said.
A farmer in Virginia had reported that 23 of his sheep were stolen.
Police searched the area and five of them were found grazing in a nearby veld.
The sheep in the veld and the ones discovered in the women’s bedroom were positively identified as the farmer’s sheep through their markings.
It was unclear what had happened to the five others which were still unaccounted for.
The woman was expected to appear in court soon.