12. Samoyed
The Samoyed is described as a white puffball of a dog, but they look this way for a specific reason. Their thick coats will keep them warm in cold climates, and even their perpetual smile serves a function: it prevents icicles from forming in the corners of their mouths and faces. They are intelligent and social animals but can be pretty mischievous if left unattended for long periods of time. Their thick coats require regular grooming, or you could end up with a very matted dog.