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
Breed club (dog) not all dog breeders belong to breed clubs, and breed clubs cannot enforce their code on non members, even when the non-members are raising the breed club's breed of dog.) The Scottish Terrier Club of America's code of ethics directs breeders to "breed only Scottish Terriers of characteristic type, sound structure and temperament... producing dogs in conformity to the AKC Standard." There is no work or hunting requirement or inbreeding prohibitions in this breed, which is primarily kept as a pet and showdog. The emphasis on breeding only for appearance in many pet breeds, combined with competitive pressure to breed