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St. Bernard
This dog breed originates from Italy and Switzerland, and they are known as gentle giants due to their size and their friendliness towards people. They are also famous, appearing in movies and books. As you would expect, they are challenging to keep indoors because of their large size. They could easily knock over furniture and cause damage to smaller items. St. Bernards love being indoors. It is also safer for them to stay indoors because they are prone to heatstroke.