Dogs are called man's best friend for a reason. Learn all about dogs, from choosing a dog to solving dog behavior problems to giving dogs first aid.

In 2008, the Westminster Kennel Club awarded the Best in Show honor to a beagle -- a first for the breed. But what exactly is a dog breed is and how did the different breeds, from the tiny Chihuahua to the massive Great Dane, originate?

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How much do dogs understand? Do they have vocabulary comprehension and retention? Can they say "Woof!" and mean it? Take this quiz and learn more about whether dogs understand words.

8 Top Dogs

Many people treat their dogs like people. Some of the dogs on our list of top dogs sure act like people! These dogs are noteworthy because of unique traits that set them apart from any other dog you can find. Check out all 8 top dogs here.

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