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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.
While you can start taking puppies 5 or 6 weeks of age outside to encourage elimination, true housebreaking should start around 7 or 8 weeks. This is the age at which puppies are able to start understanding routines and rules, so the learning process is easier for them to comprehend.