Has anyone ever used a wireless fence system? I'm contemplating purchasing one for the munchkins. We currently have a tie out in the yard that we put the dogs on when it is nice and they want to spend time outside. There are a few cons with this: 1.) Cooper HATES being on a tether. 2.) They always get tangled. 3.) Because they always get tangled, we have to go out and untangle them. 4.) The chains kill the poor flowers we have growing by the door. 5.) Only two dogs can be out at a time. Since we rent, a typical underground (or above ground) fence isn't an option. I'm not even sure if the landlord would let us put up flags for a wireless fence, but she may not even notice. Cooper and Cynder have experienced an e-collar before during their recall training, and both respond really well to it. They understand what the correction means, and I think switching them over to an invisible fence system would be easy. Gracie's never worn an e-collar before, but I also think she'd respond well. And the thought of having a fencing system that can go with Cooper and Gracie if the end up going to live with my Grandmother would be very nice. Pros/cons of a wireless fencing system? Is there are particular brand name that is best? Do they offer adjustable radius'? And adjustable correction strengths just as normal underground fences do? Will it hold up to at least three collars? (I'm okay tethering Future Puppy when he's outside unsupervised if he'll be the only one tethered.) Also, I don't think we have an outside wall socket. Could we plug in the receiver inside and have it still broadcast outside appropriately? ETA: The dogs would NOT be wearing the collars when they are inside, so them being affected by a boundary occurring inside the house isn't an issue. And that's really the only con I can think of.