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) research on breed-specific health issues. Breed clubs for agricultural stock breeds became popular social clubs in England in the late 18th century and early 19th century. The first breed club for chickens, for example, was formed in 1815 as an elite and expensive activity. By the mid-19th century, dog shows were becoming a pastime in Victorian England, and the bulldog was a popular pet. In order to make the bulldog breed smaller and more gentle, crossbreeding with pugs and other types of dogs was being done, leading to the formation of the first breed club, the Bulldog Club, in 1864,