Up And At ‘Em

In the morning Darren was awakened by the sound of Franco’s loud barks. He opened his bedroom door to find his pooch running up and down the hallway.
He was confused. He was sure that he had locked the kitchen door.
How did the dog get out? He walked up and down the kitchen, there were no other doors or windows open and nobody went into the kitchen. Holly was still sleeping. It was strange.