Hypoxia and Medicine

Can someone tell me how to create a dead zone along the boundary of an underground pet fence?

I want to leave one small area open along the border of the fence but don't want to have to double loop it because that is way too much digging. Thanks

Public Comments

1. Can you lay a piece of sheet metal over the area to block the signal? If you haven't already bought the system, I would suggest a wireless system. They are wonderful.