help for the pig farmers out there

i didn't realize:

Pigs are very smart, and can escape from just about any fencing you can rig up. But they can also be trained like dogs. So when they are piglets, teach them to come to you by shaking a can of rocks and rewarding them with an egg.

Then, when a pig gets out of the fence, simply stand inside the fencing and shake the can. The little piggy will come running home.

[via tricks of the trade]