If your dog breaches your invisible fence boundary, troubleshoot: Check for a break in the perimeter wire, a weak collar battery, poor collar fit, or lack of transmitter power. The signal field may be too narrow, or the shock level too low -- and in either case, you'll have to retrain your dog. Adjusting the collar is simple no matter what invisible fence you own. Remove the collar before making adjustments.
Check the Setting
Locate the push button on your dog's collar. Depending on the collar's model, the buttons may be inverted, requiring a pen-push, or they may be clearly visible. Most collars have at least five shock strength settings, indicated by a series of beeps or a light that blinks in series. To find out which setting the collar is on, press the button once. The collar will beep or blink to indicate that it is working, then it will blink or beep again, up to five times, to show the setting's level. One blink after the first blink means it's on the lowest level; five blinks after the first one means the shock setting is on high.
Adjust the Level
After checking the current level, press the button again within 5 seconds to raise the correction level. The collar will beep or blink in series to indicate the new shock level. Press the button again within 5 seconds to raise the level once more. Continue until the collar indicates it is at the correction level you desire. To lower the correction level, continue pressing the button; the level will cycle back to 1.