With a compact size, easy-care coat and happy nature, the Beagle has long had a place as one of the most popular breeds for families. Beagles are also used as scent detection dogs at U.S. airports, where their friendliness allows them to search for weapons, drugs, and illegal food items without making passengers nervous the way a larger “police dog” might. The breed was developed in England to hunt rabbits, and Beagles are still happiest when following their noses. For that reason, they belong to a category of dogs known as scenthounds. Don’t let the small size or undeniable charm of the Beagle fool you: these dogs are still born to hunt. They’ve been described as "a nose with four legs," and they love following a scent trail. The minute they smell something interesting they're likely to follow their noses rather than their owners' requests. There are some things you should be aware of before you bring a Beagle home. The most important thing to know is that Beagles are ruled by their nose. A Beagle will follow an interesting scent wherever it leads him, across busy streets and miles from home, so a fenced yard is essential to keep him safe (vetstreet.com).