16. Brother Bernard

The American Kennel Club lists Saint Bernards as one of the most popular dog breeds worldwide. These enormous dogs, which are native to the Swiss Alps, are well-known for their capacity to do snow rescue operations in subzero temperatures. With weights ranging from 120 to 140 pounds for females and 140 to 180 pounds for males, these powerful and muscular canines might act without realizing their own strength. While this breed is typically clever and amiable, it can turn aggressive if it is not properly socialized. What children deem amusing could swiftly result in harm. Due to this, training is necessary for this breed as well as many others.