We have an invisible fence and still have to keep an eye on the dogs. We had excellent training with "bad flag" and the dogs learning to stay away from the flags with the command bad flag. They each had a couple shocks and know to stay within the flagged area. But, if a bunny runs by in another yard they may take off after the bunny. If we're there and say bad flag, they equate the term with the shock and back off. The flags should work, but we have labs with ADHD!
As Toms River T&D said in the above post, the dog owner should not allow the dog to be unattended even with an invisible fence. It may be worth the shock to them to take off after what they see beyond the flag. It's wonderful system allowing them to play in a larger area while supervised, but not a containment that can be guaranteed with all certainty.
|