Age is merely a number and there are some older drivers who have experienced little if any physical diminishment. Still, for many, the march of time brings with it ailments and conditions that can make driving uncomfortable and downright dangerous. Fortunately, today's automobiles are available with a host of features designed to help compensate for many of the physical changes that can come with aging.
Both British and American breed standards state that a Chihuahua must not weigh more than six pounds for conformation. However, the British standard also states that a weight of two to four pounds is preferred and that if two dogs are equally good in type, the more diminutive one is preferred.
Chihuahua heights range from 6 to 9 inches at the wither or shoulder, and breed standard requires that the body length -- measured from the shoulders to the buttocks -- and height cannot be the same. Instead, the body length should be slightly longer than the height. A Chihuahua fitting the standard, then, could be as as little as 7 inches long to as much as 12 inches long.