In the case of the Chihuahua, blue merle Dachshunds were probably crossed in. Which essentially means that merle Chihuahuas aren't truly purebred. But since genetic diversity is a good thing in living creatures, I don't view cross-breeding as an evil thing. If there are a few Dachshund genes floating around in a merle Chihuahua, that wouldn't bother me.
The experiment was a huge success. Because they are small, friendly, and cute, the Beagles didn't intimidate people who are afraid of dogs, and with their super nose power, they could be trained to identify specific food articles while bypassing those that weren't contraband. Today, members of the "Beagle Brigade" patrol the baggage-claim areas at more than 20 international airports and other points of entry into the United States.
Well, there are a lot of things to love about terriers and terrier mixes. They are known for their spunky tenacity, which can be heart-warming, hilarious and occasionally inspiring. They are also very bright, the result of generations of terrier being used for hunting. What you might not know is that they have a long history of bravery. In fact, there have been a number of terriers that have served in the armed forces and police departments. On top of that, they have been guarding households for centuries.
Generally there is a wide interpretation of what is called “breed”. Breeds are actually categorized by a functional type from which a breed has developed. The most of the breeds are traditional breeds with a very long history, who are registered. There are some rare breeds, who have also their own registries, but some new breeds are still under development. There are even a lot of dog breeds, who are in danger to extinct. There are a few cases, where the origin of breed overlaps the frontier of two, three or more countries. As the general rule the dog is listed in the country in that he is most commonly associated, according to the FCI (Fédération Cynologique Internationale), by the designated country of the dog. There are some dogs, who have an uncertain origin, therefore they are getting classified under several countries.
Two-color varieties always have a white base color with areas of the second color. Tan and white is the most common two-color variety, but there is a wide range of other colors including lemon, a very light tan; red, a reddish, almost orange, brown; and liver, a darker brown, and black. Liver is not common and is not permitted in some standards; it tends to occur with yellow eyes. Ticked or mottled varieties may be either white or black with different colored flecks (ticking), such as the blue-mottled or bluetick beagle, which has spots that appear to be a midnight-blue color, similar to the coloring of the Bluetick Coonhound. Some tricolor beagles also have ticking of various colors in their white areas.