[Betty'sMom]

I don't think I would use it on small dogs. I also wouldn't trust that they wouldn't 'cross over' the wire. Once they're over it, they're free to go. anywhere. And they would be too scared to cross back over because they would get another shock. I guess I might be too cautious for that...I'd freak out if they got out and went into the street. I'd rather put several x-pens together and let them play in there.