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
Hypoallergenic dog breed for most breeds, when not regularly bathed, even a dog who sheds very little or has little dander can trigger a reaction in a sensitive person. Size may be a factor in determining hypoallergenicity. It is possible that the total body surface area of the dog is more indicative of reduced production of allergens than its breed. Smaller dogs will also leave fewer environmental pollutants containing dog dander and dog allergens (reduced fecal matter, urine and saliva). Small hairless dogs may be less likely to cause allergic reactions "because it's so easy to bathe them and the dander falls off