I have a beagle dog, it has a great sense of smell and superior tracking instinct
I have always wanted one. I thought they would be the perfect size for me since I don't like big dogs.
Wow, that is good, the beagle is employed as detection dog for prohibited agricultural imports and foodstuffs 
Oh wow, I guess they have a good sense of smell then.
Oh yes, even very intelligent but single minded
Sounds like a really good dog to have. Are they good with kids?
Beagle
The beagle is a breed of small hound that is similar in appearance to the much larger foxhound. The beagle is a scent hound, developed primarily for hunting hare (beagling). With a great sense of smell and superior tracking instinct, the beagle is employed as detection dog for prohibited agricultural imports and foodstuffs in quarantine around the world. The beagle is intelligent but single-minded. It is a popular pet due to its size, good temper, and lack of inherited health problems.
The modern breed
Tracking (dog)
Tracking is a technique in which dogs are trained to locate things while in use by humans. They use the object's scent, for a variety of purposes.
Tracking has always been an essential skill for dogs to survive in the wild, through hunting and tracking down potential prey.
Physiological Mechanisms of Tracking.
Primarily, dogs use their sense of smell, to find and follow a track. Dogs have a highly sensitive olfactory system superior to humans, and are able to discriminate between