| GCH Roundtown Mercedes of Maryscot | |
| Othername: | Sadie |
| Species: | Canis lupus familiaris |
| Breed: | Scottish Terrier |
| Gender: | Female |
| Birth Date: | 2 April 2005 |
| Birth Place: | Mackinac Island, Michigan |
| Death Place: | California |
| Occupation: | Show dog |
| Best in Show at the Westminster Kennel Club Dog Show | |
| Term: | 2010 |
| Predecessor: | Ch. Clussexx Three D Grinchy Glee (Sussex Spaniel) |
| Successor: | GCH Foxcliffe Hickory Wind (Scottish Deerhound) |
| Owner: | Amelia and Dan Musser |
| Parents: | Ch. Anstamm Like A Rock (father) Ch. Maryscot Painted Black (mother) |
GCH Roundtown Mercedes of Maryscot (2 April 2005 - 13 August 2014), also known as Sadie, was a Scottish terrier from Mackinac Island in the U.S. state of Michigan.
Sadie was named the 2010 Best in Show winner at the Westminster Kennel Club Dog Show.[1] [2] This made her the first Triple Crown winner; she also won the National Dog Show in November 2009 and the AKC National Championship in December 2009.[3]
Sadie's owners were Amelia and Dan Musser, and her handlers were Gabriel and Ivonne Rangel.[1] Sadie's father and littermates were all named after cars.[4]
Sadie died on 13 August 2014, at the home of her handlers in Rialto, California, following complications from surgery.[5]