This photo of George HW Bush's service dog is the most heartbreaking thing you'll see today.

If you don’t want to feel sad today, look away.

George HW Bush’s service dog Sully has been captured lying by the former president’s casket, and the photo is heartbreaking.

The photo of two-year-old Labrador Sully, who has assisted Bush since June this year, was shared by his spokesperson Jim McGrath on Monday.

“Mission complete,” the photo was captioned.

Mission complete. #Remembering41 pic.twitter.com/rXdyXAS4lk

— Jim McGrath (@jgm41) December 3, 2018

Sully assisted the 41st President of the United States after former first lady Barbara Bush passed away in April this year to provide support and companionship.

According to SBS, Sully was able to perform two pages of commands, including grabbing the phone and opening doors for Bush.

The service dog completed his last work today as he travelled with Bush’s body as it was flown from Texas to Washington DC, in preparation for the US’s national day of mourning on Wednesday.

Sully also walked in the procession as Bush’s casket was carried by Secret Service members from the funeral home.

 

View this post on Instagram

 

Assisting with voting must be easier with thumbs. It was very nice of Secretary James Baker to help my best friend cast his vote. They didn’t even let me push the button! . . #vote . . . . . . #SullyHWBush #SullyBush #bush41 #instagood #goodboy #DogOfInstagram #TalesOfALab #InstaDog #InstaDogs #Dogs #AmericasVetDogs #GuidedogFoundation #labrador

A post shared by Sully H.W. Bush (@sullyhwbush) on Nov 1, 2018 at 1:39pm PDT

Although Sully was a valued member of the Bush family, he will now go into service to help other veterans.

“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 National Military Medical Centre), that he brought to 41,” former President George W Bush wrote on Instagram earlier this week.

Up until his death, Bush had been using a wheelchair since 2012.

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. pic.twitter.com/Fx4ZCZAJT8

— George Bush (@GeorgeHWBush) June 25, 2018

He had been suffering from vascular Parkinsonism, a stroke-related illness similar to Parkinson’s disease.

Bush was US president from 1998 to 1993, while his son was president from 2001 to 2009.

He passed away on November 30th at the age of 94.

We have FIVE $100 gift vouchers up for grabs. Take our survey now for your chance to win.