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) to enforce its regulations and code of ethics on non-members of the club. Other dog clubs encompass multiple breeds of the same type, such as the Hunting Retriever Club for retrievers. Such a club is not usually referred to as a breed club. Crossbred portemanteu-named designer dogs may have affinity groups and clubs that might be called breed clubs, although the dogs are not actually a breed of dog, but are a crossbreed of two breeds. The UK based, Cockapoo Club of GB, has raised standards of ethical breeding by ensuring that Approved Breeders adhere to a Code of Ethics.