We’ve been getting a lot of questions lately about the right age to start a dog on an electronic pet containment system. The general rule of thumb is 4 months, but it really depends on the dog. Once your dog can follow the three basic commands – come, sit, and stay – he or she can be trained on the pet containment system. Puppies under 3 months typically don’t have quite the attention span they need to learn their boundaries. If you have any concerns, it can be a good idea to consult with a qualified obedience trainer.