Bush said on Twitter Monday that Sully is a beautiful and beautifully trained golden lab from the America's VetDogs non-profit organization in New York.
The group provides service dogs to veterans in need.
The former president said he could not be more grateful, especially for the organization's commitment to veterans.
If you'd like to follow Sully's adventures, he has his very own Instagram account: @SullyHWBush.
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