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

<P0-S0> Our Pack is a non-profit Pit Bull rescue, training and education organization based in Los Gatos, California. <P0-S1>  The organization was founded by Marthina McClay, a certified pet dog trainer and therapy dog tester. <P0-S2>  It rescues Pit Bulls from abusive situations, and provides education and training about the breed to the public. <SEP> <P1-S0> 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. <P1-S1>  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. <P1-S2>  The Birmingham Roller has a flying type and a show type. <P1-S3>  Show Rollers are larger than the flying variety, and are bred just for show. <P1-S4>  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. <P1-S5>  Oriental Rollers are another aerial performer and come in many colour varieties. <P1-S6>  Some fanciers fly their rollers in competition, both locally and nationally. <P1-S7>  There is even a World Cup competition that includes several other countries. <P1-S8>  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. <P1-S9>  The Birmingham Roller is a very popular breed of performing pigeon, with around 10,000 breeders worldwide. <SEP> <P2-S0> 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. <P2-S1>  The name "Sennenhund" is derived from the German "Senne" ("alpine pasture") and "Hund" ("dog"), as they accompanied the alpine herders and dairymen called "Senn". <P2-S2>  "Berner" (or "Bernese" in English) refers to the area of the breed’s origin, in the canton of Bern. <P2-S3>  This mountain dog was originally kept as a general farm dog. <P2-S4>  Large Sennenhunde in the past were also used as draft animals, pulling carts. <P2-S5>  The breed was officially established in 1907. <P2-S6>  In 1937, the American Kennel Club recognized it; today, the club classifies it as a member of the Working Group. <SEP> <P3-S0> A grief therapy dog (also known as an emotional support dog, companion dog, or comfort dog) is a form of animal-assisted therapy. <P3-S1>  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. <P3-S2>  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. <P3-S3>  Popular breeds used as therapy dogs include the Portuguese Water Dog, Bernese Mountain Dog, St. Bernard, and Golden Retriever.