I've mentioned in other posts that we keep traditional breed pigs for pork.
Here are a few pics...
1. British Saddlebacks
2. Oxford Sandy & Black. Once almost extinct in the UK.
3. Berkshire - one of the oldest pure breeds in the UK. Apparently they are highly prized for their taste by the Japanese Royal family!
These pigs are not usually kept commercially so it is up to small scale breeding and enthusiasts to keep the breeds viable. They do taste far better than anything you can buy in the supermarket.