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Young dogs can react unpredictably to electric dog fences, so understanding a puppy's development is essential to deciding when to start training the animal with the fence and collar. Generally, puppies should not be introduced to electric dog fences until they're at least four or five months old.
1 An electric fence can cost $0.05-$0.75 a foot for do-it-yourself installation, depending on the number of strands and whether it's smooth or high tensile wire, or $50-$650 to enclose an acre and $2,700-$4,000 for a mile of electric fence.