Sully will go to Walter Reed after President Bush's Funeral

"Sully went to work with Bush this summer after former first lady Barbara Bush passed away earlier this year."

Washington (CNN) Sully, a yellow Labrador service dog who worked with late former President George H.W. Bush, is accompanying his master one last time by traveling to Washington with Bush's casket.

In a photo tweeted by Jim McGrath, Bush's spokesman, Sully can be seen sitting directly in front of Bush's casket at a Texas funeral home Monday morning, his head bowed in unison with the Bush family members that surround him.

A highly trained service dog, Sully will now go back into service to help other veterans and is going to Walter Reed National Military Medical Center, former President George W. Bush wrote in an Instagram post.