Fence Store What Is The Hardware Store Version Of 20 Gauge Pet Fence Wire?

What is the hardware store version of 20 gauge pet fence wire? - fence store

We are entering into a new house, so I have to configure our Innotek dog fence. Instead of buying yarn for the luxury brand, I expected to pick up a spool at Home Depot and Lowes. I wonder what I look at the hardware store .. Just when 18 or 20 gauge copper wire?

Here are the "official" cable is

http://www.americas-pet-store.com/details/prodid/87.html

Here is the fence that we

http://www.americas-pet-store.com/details/prodid/262.html

(I know there are people saying that these fences are really cruel, but it would be much worse if my dogs dug under / is nearing the end of the movement, and it's on a busy street.)