No.
No Golden Retriever has ever won Westminster.
the closest was 'Golden Peach' who is a Yellow Lab that got second place in 2015.
There was also a Labrador Retriever (Polar Bear) who came in fourth place for Best of Opposite Sex back in 2005, and another one (Darcy) is competing this year for Best of Breed and will likely make her way onto the best-in-show podium if she does well enough tomorrow night at Madison Square Garden."
"This goes to show you: betting on golden retrievers is probably not wise...unless it's for Westminster...