From Yahoo:  On a farm in North Dakota, a 3 year old wandered away from the house.  When mom noticed the child was missing, authorities were notified and a frantic search began.  Approximately 200 volunteer searchers worked into the night and at 2:30 AM the boy was spotted in a field…with the dog literally babysitting.

They found the dog laying on the boy. “[Carson] said, ‘Mom, I was really scared but Cooper laid on me, he kept me warm,'” said Courtney Urness. Cooper might have been returning a favor for the Urness family. They rescued him when they found him as a puppy wandering by the side of the road three years ago.