The epitome of a dog whose bark is worse than its bite, the Chihuahua is best known for its tiny size and laughably aggressive attitude. Hardly ever a real danger, they fill the homes and hearts of many people. Some types exist outside the stereotypically tan-bodied Chihuahua seen on T.V. “Merle” is the term for a dappled coat pattern, typically made up of a range of 5 to 6 colors that can appear as small specks or large, heathered markings. Despite their diminutive size, Chihuahuas can be born with a merle coat and look stunningly unique.