Chihuahua (dog) The affected chihuahua will hold its leg flexed, and foot off the ground until the quadriceps muscle relaxes and lengthens, after which the animal feels no discomfort and continues with activity. Chihuahuas are also prone to some heart-related disorders, such as heart murmurs and pulmonic stenosis, a condition in which the blood outflow from the heart's right ventricle is obstructed at the pulmonic valve. Chihuahua (dog) The Chihuahua () is the smallest breed of dog and is named after the state of Chihuahua in Mexico. Chihuahuas come in a wide variety of colors, and two coat lengths. The Chihuahua's history
Mixed Breed Dog Clubs of America title, all of its sanctioned events take place under its regional clubs. Previously, these regional clubs were the Mixed Breed Dog Club of California, Mixed Breed Dog Club of Oregon, Washington Mixed Breed Dog Club, and the Mixed Breed Dog Club of St. Louis. After the American Kennel Club began allowing Mixed Breeds to compete in agility, obedience, and rally through its Canine Partners program, all of the Mixed Breed Dog Club chapters closed except for the St. Louis Chapter. All other members of the club, outside of the St. Louis area, are designated as national club members. Mixed Breed