Story of George H.W. Bush's beloved dog who faithfully joined his companion on the final journey

Sully the dog warmed the heart of the nation as we bid farewell to the late George H.W. Bush. Yet the loyal companion's journey is not over.

Bush passed away on November 30 at 94 and left family and supporters in a state of grief. But when we got a look at how his service dog said goodbye, it was hard not to smile inside.

Sully, full name Sully H.W. Bush, was given to Bush after the passing of his wife Barbara Bush earlier this year. The VetDogs nonprofit organization placed Sully with the veteran, who had been a Navy pilot in World War II.

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When Bush welcomed Sully into his home in June, he tweeted:

"A great joy to welcome home the newest member of our family, "Sully," a beautiful - and beautifully trained - lab from @AmericasVetDogs. Could not be more grateful, especially for their commitment to our veterans."

Over the months leading up to his owner's death, Sully helped Bush to retrieve items, open doors, and even assist in voting at the most recent election, according to CBS News.

Sadly, who is just under two years old, was left without a companion as of last Friday. The Bush family will greatly miss him, but he is moving on to other honorable things.

Under a picture of Sully laying in front of Bush's open casket, the former president's eldest son wrote:

"As much as our family is going to miss this dog, we're comforted to know he'll bring the same joy to his new home, Walter Reed, that he brought to 41."

The picture used is one that captivated hearts over the weekend. Sully's own Instagram page featured the photo along with the caption: "Mission Complete."

The gentle dog now has over 225,000 followers on the social media platform. It grew as the public saw the dog go from Texas to Washington alongside Bush's casket.

The faithful dog was even flown on the Air Force One, whose name was temporarily changed to Special Air Mission 41 up till Wednesday in honor of Bush.

Sully, who was named after a pilot that landed the plane in the Hudson River in 2009, was then observed mourning at the state funeral on Wednesday.

Donned in an American flag service vest, Sully listened as tribute was paid to Bush. He appeared to pay his own as he lay down and remembered the man who had loved him so much he got a pair of socks in the dog's honor.

But it is now time to move on to the next mission. Sully will spend the holiday season at Smithtown with America's VetDogs. Then he will go on to the Walter Reed National Military Medical Center's Facility Dog Program.

There, the VetDogs state:

"He will be working alongside fellow VetDogs facility dogs SGT Dillon and SGT Truman who are there to assist with physical and occupational therapy to wounded soldiers and active duty personnel during their journey to recovery at Walter Reed Bethesda."

Sully joined the ranks of other dogs who provided emotional support to well-known figures in the United States. Looking at the list, it's easy to see that age has nothing to do with the need to have one of man's best friends by one's side.

Source: YouTube/ TODAY

Singers Selena Gomez, Miley Cyrus, and Britney Spears all have dogs to help along their way. Actors Natalie Portman, Bradley Cooper, and Sandra Bullock also own four-legged companions to get through rough times.

Even Oprah has owned several furry friends over the years. And despite being celebrities, they've registered their pets as emotional support dogs so as to travel with them the right way.

Meanwhile, we wish Sully a long life as he steps out of his most recent home and into a new home with more friends and hopefully even more belly rubs.