All great advise above. We have a half Germane Shorthair half Chocolate Lab and don't need a fence with her...it just took time and training.Our neighbor behind us had one put in and it worked like a charm for their lab. My advice is if you have one installed, make certain you and the installer know exactly where the property boundaries are. My neighbor installed theirs 5' into my property. I told them about it and they didn't seem like it was a problem. Trying to be a good neighbor, I let it drop and it was never moved. Fast forward to last month, while rototilling a new landscaping bed I tore up the wire. My neighbor asked me to pay to have it replaced. I asked him to reimburse me $5 per pile of cr-p that I had to clean up from his dog for the past six years.Apparently my reply was insulting since he no longer speaks with me.To prevent any issues, know your exact property boundaries.
I think it depends on the breed. Good training is the key.
Questions: Laying a door mat over the line blocks the signal? So I guess driving a car over the line also blocks the signal? No need to switch the unit off?
Think of it as a training device, not an invisible gate. They start out with little white flags to show the dogs were the limit for them is. If they get too close the shock collar goes off so they learn where they can and can't progress to. I recall one at a neighbors house and as we walked our dogs past we often saw their dog outside the perimeter. He would charge the perimeter and get outside of it then could not get back in because it would shock him so he remained outside the perimeter until someone turned it off. They used it as a gate and it is not fool proof. If you are watching then you should be good. Are those English Setters? We have had 4 of them.