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It weighs only 1-3 kilograms, its height reaches only 15 cm. The Chihuahua has a domed skull. Some dogs have a soft patch on the top of the head where the bones are not connected. It is called the fontanelle. They have large, erect ears and short, pointed muzzles. The eyes are round and large. Dogs are longer in length than in height, the tail is long and raised above the back.