Most dogs are easily trained to respect the boundaries of the invisible fence and wear a special battery-operated collar that provides a gentle reminder should they forget those boundaries. Electric fences require an active battery-operated collar to be effective. Batteries need to be replaced three or four times a year.
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Many electric fence companies encourage owners to join a membership program that automatically sends a new battery at appropriate intervals. Other types of electronic devices or perimeter guards need upkeep too.
Pic of the Day: My friend’s dog and a fox!