We have had one for the last two years at x - mas on a spit Gordo and they are delicious.
Just make sure you worm them out if you are going to use all of the products from the pig, however if you are just roasting the meat, they will be fine without worming.
How does your Bully go around the pigs? They have a very strong natural prey drive and are one of the few dogs that will hang a pig straight up even if they have never seen them before.
Make sure you butcher them before they are too big. Little boars are perfect around 30 kilos and sows can be left to go longer. The 25 - 30 kilo mark is perfect for the spit roast though!
Also Gordo,
If you stay away from the pellets and just feed them grass, veges, fruit and roughage, you will have a far better pig for the table. Do not feed them any fish, meat or other foods high in protien as they will grow too quick and develop a stronger flavoured meat.
Cheers,
Nick