Different breeds, and different dogs within those breeds, have different drives. I know some well-trained dogs that will still gleefully run away and explore t

Different breeds, and different dogs within those breeds, have different drives. I know some well-trained dogs that will still gleefully run away and explore the woods if given the chance... and then return sheepishly 20-30 minutes later. If they ever do get lost, or someone else "finds" them, etc, it'll be a tragedy. They also tend to come back covered in thorns, with cut-up paws, etc, etc.