Years ago we had a wild herd on Maui that the DLNR wanted eradicated, which they did. Not like hunting moo cows in the pasture. These were wild animals, surprisingly cagey. I took a young bull with the bow and later a big ol cow with a rifle on a special eradication hunt. They make packing out elk seem like a walk in the park.
Lanai had some a one point too, but no more. They just recently killed the last two bulls that eluded everyone for over two years. They lived in the tall cane grass, one of the wildlife managers said it reminded him of hunting cape buffalo.
To answer the question, I don't know for sure, nowhere I know of currently, if anywhere maybe the Big Isle. They used to hunt feral donkeys there also until the wild horse huggers got involved and shut it down. I'm still waiting for my invite from one of the cowboys but not going to hold my breath.