Originally posted by SLOWpoke:

I haven't tried this, but maybe you can build a cage and put one in it and push it onto a boat. I use food to entice them short distances, throw it in front of them and don't let them quite get it, like a carrot on a stick.

Edit - It would actually be fun if you could ride a pig, with a carrot on stick to steer it

I do a similar thing, and play a game "first two to the other side live", but they don't seem to understand that. :-)