When used correctly, a wireless dog fence can do a great job keeping your dog contained. It’s important to remember that no electric dog fence is guaranteed to be completely effective, just as no traditional barrier fence is guaranteed effective. Dogs are intelligent creatures, and some dogs find ways to outwit an invisible fence, just as some dogs find a way to burrow, climb or force their way beyond a barrier fence. You’ll have the best success with an invisible dog fence if you take the time to train your dog how to respond to it—a process that could take up to 2 weeks. Get your dog used to the warning signals emitted by the collar and use training flags to establish the new invisible yard boundaries. Just as with all types of training, clear signals, repetition and consistency will yield the best results.