Avids are similar to haggis. They walk/run around hillsides all their lives so one pair of legs is shorter than the other, so they can only run in one direction.

Therefore two hunters are needed. One runs from behind making the avid or haggis run forward, the second hunter must wair behind a bush or rock and spring out at the right time to surprise the prey. In its confusion it will panic and try and turn back. Because it has two short legs on one side it will then fall over. Easy really!

Not too sure if there are clockwise running ones or ant-clockwise running ones as they are very rare beasts.