The Story of Xentrix

I have a story to tell. Once there was a boy who had a large dog; the dog was called Xentrix. One day the boy was walking in the woods with Xentrix; he stumbled on a wooden door. Xentrix opened the door, and the boy followed him inside. What the boy saw amazed him: there was a cave one mile long, and inside the cave were one million other children and a million dogs. The boy could not hold back his tears when he heard Xentrix say, "Welcome my friend. These are my people; now they are your people too."