We will examine the option of invisible fences and the so-called "shock collars."

I'm a divorced mom with two kids at home, and I had an invisible fence, but my dog would just break through it.

The technology could be used to create "invisible" fences capable of holding back crowds without resorting to gunfire.

We need to create an invisible fence, an invisible shield.

"The place where things are growing seem to stop in a comparatively clean line- like someone had made an invisible fence running east."

The invisible fence around Washington Heights had defined his life in America.

Barbaric: a slight shock similar to the invisible fence some poor doggies contend with.

Just think of it as an invisible fence.

Many people don't get invisible fences because they think that they are painful and traumatizing to the dog.

And do I mind that some of my neighbors have installed invisible fences to protect me from their dogs?