The dog was rescued by Eileen Jones, of Friends of Animals Wales, a small volunteer-run rescue shelter which specialises in rescuing and rehabilitating sick and discarded farm dogs. Miss Symonds added: “Thanks to the wonderful Eileen from FOAWales who rescued Dilyn after she got a tip off that he was to be dumped by a puppy dealer because he was born with a crooked jaw. “Eileen fixed his little jaw & saved his life. She is a hero.”
It will join Larry the cat, Downing Street’s other famous pet, at the Prime Minister’s official residence.
It is hoped the little dog is young enough to be trained to get along with Larry.
Unlike Larry, whose official title is the “chief mouser”, the puppy will belong to Mr Johnson and Miss Symonds, rather than the occupant of Downing Street.
The Prime Minister’s official spokesman said: “They are a fantastic charity run by volunteers who work around the clock to make a difference to animals.
“The Prime Minister has always been a passionate supporter of animal welfare and has always believed that animals should always get the right start in life.
“That’s why the Government has taken such significant action in this area, and that obviously includes introducing Lucy’s Law.”
Earlier this month, the PM polled No10 staff on whether to get a dog and received an overwhelming “yes” from his team.
A number of staff have also volunteered for dog-walking duties.
Mr Johnson and Miss Symonds are hoping to raise awareness for new strict anti-puppy farming legislation, known as Lucy’s Law, which comes into force next April.