Question: What popular breed that is a grief therapy dog can be found in the mountains and originated from the canton of Bern?

Context paragraphs:
Angel (therapy dog): Angel (born March 9, 2009) is a one-eyed, three legged therapy dog and the Official Therapy Dog of Houston, Texas.  The female Golden Retriever works at Houston Methodist Hospital, Memorial Hermann Hospital (Children's and Southwest facilities), Sheltering Arms Assisted Care and Hampton Assisted Care.  She also works with University of Houston students and is an active member of Faithful Paws, an organization sponsored by Bellaire United Methodist Church with human-pet teams that visit 120 facilities in and around Houston.  Angel is the animal companion of Trish Herrera of the band Mydolls.

Norbert (dog): Norbert is a fluffy, 7" tall mixed breed registered therapy dog, best known for his Norbert picture book series, and his popularity on social media.  Norbert's breed is unknown, but is suspected to be a cross between 3 dog breeds, chihuahua, cairn terrier & lhasa apso.  Norbert's time, money and book revenue is given to various charitable causes throughout the United States.

List of Labrador Retrievers: This list of Labrador Retrievers covers notable individual dogs that belong to this breed.  The Labrador retriever is the most popular breed of dog (by registered ownership) in both the United States and the United Kingdom.  The breed is exceptionally affable, intelligent, energetic and good natured, making them excellent and popular pets, companions and working dogs.  They have a high work ethic Common working roles for Labradors include: hunting, tracking and detection, disabled-assistance, carting, and therapy work.  Approximately 60–70% of all guide dogs in the United States are Labradors.

Our Pack: Our Pack is a non-profit Pit Bull rescue, training and education organization based in Los Gatos, California.  The organization was founded by Marthina McClay, a certified pet dog trainer and therapy dog tester.  It rescues Pit Bulls from abusive situations, and provides education and training about the breed to the public.

Birmingham Roller: The Birmingham Roller is a very popular breed of domesticated pigeon that originated in Birmingham, England, where they were developed via selective breeding, for their ability to do rapid backward somersaults while flying.  As the name suggests and as also mentioned by Wendell Levi in his book "The Pigeon", this breed was developed in and around the City of Birmingham in England.  The Birmingham Roller has a flying type and a show type.  Show Rollers are larger than the flying variety, and are bred just for show.  A similar breed called a Parlor Roller look much like Birmingham Rollers, but can't fly; rather, they spin backwards, somersaulting on the ground for many yards.  Oriental Rollers are another aerial performer and come in many colour varieties.  Some fanciers fly their rollers in competition, both locally and nationally.  There is even a World Cup competition that includes several other countries.  Kits (group of pigeons) are scored for quality and depth, as well as the number of birds that roll at the same time, referred to as a turn or break.  The Birmingham Roller is a very popular breed of performing pigeon, with around 10,000 breeders worldwide.

Felicity's Diamond Jim: Ch.  Felicity's Diamond Jim, CD, RE (June 8, 2000 – May 6, 2011), commonly known as James, was an English Springer Spaniel, best known for being the 2007 Best In Show winner at the Westminster Dog Show.  It was his 51st Best in Show victory, and his last, as his owners chose to retire James after the win to focus him on his work as a certified therapy dog.  He was handled exclusively by the same handler who took Ch.  Salilyn 'N Erin's Shameless to a best-in-show at Westminster in 2000.  In retirement he was recognised in 2008 by the English Springer Spaniel Field Trial Association for his work as a sire and has produced many champion offspring, including Ch.  Cerise Jesse James.

Grief therapy dog: A grief therapy dog (also known as an emotional support dog, companion dog, or comfort dog) is a form of animal-assisted therapy.  Dogs have been proven to be able to assist people in overcoming grief, which has led to a recent rise in the use of therapy dogs; although animal-assisted therapy theory has been around since World War II.  Grief therapy dogs can be found in locations such as funeral homes, hospitals, nursing homes, schools, and hospices, and may provide support in situations such as funeral services, counseling sessions, and disaster relief.  Popular breeds used as therapy dogs include the Portuguese Water Dog, Bernese Mountain Dog, St. Bernard, and Golden Retriever.

Rocky Top's Sundance Kid: Ch.  Rocky Top's Sundance Kid ("aka: "Rufus"") (April 8, 2000 – August 9, 2012), is a Bull Terrier who is best known for being the 2006 Best In Show winner at the Westminster Dog Show.  He is the first Colored Bull Terrier to win Best in Show at Westminster, with the only other victory for his breed going to a White Bull Terrier in 1918.  He also won Best in Show at the National Dog Show in 2005, and on retirement trained as a therapy dog.  He is the most successful Colored Bull Terrier Show Dog of all time.

Therapy dog: A therapy dog is a dog that might be trained to provide affection and comfort to people in hospitals, retirement homes, nursing homes, schools, hospices, disaster areas, and to people with mental disorders, such as anxiety disorder or autism.

Bernese Mountain Dog: The Bernese Mountain Dog (German: "Berner Sennenhund" ) is a large-sized breed of dog, one of the four breeds of Sennenhund-type dogs from the Swiss Alps.  The name "Sennenhund" is derived from the German "Senne" ("alpine pasture") and "Hund" ("dog"), as they accompanied the alpine herders and dairymen called "Senn".  "Berner" (or "Bernese" in English) refers to the area of the breed’s origin, in the canton of Bern.  This mountain dog was originally kept as a general farm dog.  Large Sennenhunde in the past were also used as draft animals, pulling carts.  The breed was officially established in 1907.  In 1937, the American Kennel Club recognized it; today, the club classifies it as a member of the Working Group.

Supporting paragraphs: Grief therapy dog Bernese Mountain Dog
Answer: The Bernese Mountain Dog