This ranking counts down the 25 smartest dog breeds based on Stanley Coren's widely respected 2006 book The Intelligence of Dogs, which measured trainability and working intelligence across breeds recognized by the American and Canadian Kennel Clubs.

Poodle crossbreeds have grown overwhelmingly popular, sparking controversy in dog parks and kennel clubs alike.

When dog owners meet in day-to-day life, it's only natural to ask a few questions, like what's your dog's name? What breed are they? And while you're bound to hear the same few answers more often than others, you'll also learn about plenty of new and rare ...

Body condition score (BCS) also influences lifespan. Studies show that dogs that have a lean body condition live approximately 2 years longer than dogs that are overweight. Obesity increases the risk of chronic diseases such as diabetes, arthritis and neoplasia (cancer).