A 9-week-old baby is lucky to be alive after being saved by her best friend; the family dog.

The Brousseau family of Portland, Conn., went to bed Sunday night only to soon be awaken by their dog, Duke, who jumped up on their bed and started shaking uncontrollably.

"He is insanely obedient, so this is extremely bizarre," Jenna Brousseau told WFSB, of Duke's behavior on Oct. 7.

Once awake, the new parents said they immediately knew something was wrong and went to check on their baby daughter, Harper, who is barely two-months old. The parents discovered that Harper was not breathing.  

The Brousseaus quickly called 911 and paramedics were able to revive the baby. Now, Duke is being lauded as a hero. 

"If Duke hadn't been so scared, we would have just gone to sleep," said Brousseau.

If the dog hadn't alerted her parents, Harper could have been a victim of sudden infant death syndrome, or SIDS, a devastating condition for which doctors have yet to find a cause, ABC News reported.

The Brousseaus adopted Duke, a mixed-breed dog, from a shelter six years ago, and said they decided to share their story to inspire other families to adopt shelter dogs.

Duke looked very proud next to his family, as Brousseau explained how much he means to them.

"He's the perfect dog. He was meant to be ours, and meant to be hers,” she said. “I tell him all the time, 'You were born in mommy's heart,' just because he was so meant to be ours. He's heaven. He's a good boy."