6. Norwich Terrier
The Norwich Terrier is a fun little breed initially bred to chase rats. They’re fearless and will take on anything they see as a threat. They are not the same as the Norfolk Terrier, which is an entirely separate breed: the Norwich terrier has upright ears while the Norfolk terrier has drop ears. They do require companionship, so having another terrier in the home or having someone who is home all the time can help curtail separation anxiety. They’re effortless to train, especially with treats, so they make excellent dogs use in agility training.