This story takes “who rescued who” to a whole new level.

The Rosseau family of Connecticut adopted Duke from their local shelter. Six years later, Duke woke them in the middle of the night, frantic.

Because his mom said Duke was usually “insanely obedient,” the fact that he wouldn’t stop his behavior instantly let them know something was wrong.

They found their 9-week-old baby, Harper, in her crib, not breathing.

Dad immediately called 911, and the little one was saved. All thanks to one very special, beloved shelter dog!

We love you, Duke. Thank you for making our #FeelGoodFriday so perfect!

Watch what ABC News reported on his story when it happened below.