Donald Trump wishes Joe Biden well after President-elect twists ankle playing with his dog

US President Donald Trump has wished Joe Biden well after he suffered a nasty ankle injury while playing with his dog Major.

The President-elect's office revealed Biden slipped and sprained his ankle on Saturday (local time). While initial X-rays showed no obvious fracture, a follow-up scan indicated he'd suffered hairline fractures to his lateral and intermediate cuneiform bones.

"Get well soon!" Trump tweeted in response to a video showing Biden leaving an orthopedic office in his home state of Delaware.

It is anticipated Biden will require a walking boot for several weeks as he recovers, his physician Kevin O'Connor said in a statement.

Major, a German shepherd rescued from the Delaware Humane Association in 2018, is set to make history in January by becoming the first rescue dog to grace the halls of the White House.

He's one of two German shepherds the Bidens own, the other named Champ. It's understood Biden has a soft spot for the breed, having owned and trained them since his childhood.

The Bidens say they will bring both their dogs to the White House, and also plan on getting a cat.

The last four years under Trump marked the first time in US history that a President did not have dogs in the White House.

The Trump family had no pets at all - likely because the outgoing President reportedly dislikes them. In her 2017 memoir Raising Trump, the real estate mogul's first wife Ivana claimed: "Donald was not a dog fan."

An Instagram post shared by Biden just before Election Day came with a simple campaign message - "let's put a dog back in the White House!" - alongside a video compilation of dogs sporting different campaign paraphernalia.