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
A Guide to the Birds of Mexico and Northern Central America on the front cover, a short-crested coquette on the spine, and an unspotted saw-whet owl and two plumbeous kites on the rear cover. 71 colour plates are placed centrally within the book, between pages 400 and 401. A Guide to the Birds of Mexico and Northern Central America A Guide to the Birds of Mexico and Northern Central America is a field guide to birds, covering 1070 species found in Mexico and five other countries in northern Central America (Guatemala, Belize, El Salvador, Honduras and Nicaragua). It is a 1995 book by Steve N. G. Howell and Sophie Webb, published