If you own a chihuahua better you should know about this, you must be very sensitive to the fact that short-haired Chihuahuas, and even long-haired ones, are vulnerable to the cold. In temperatures of 35-40 degrees Farenheit.We recommend dressing your Chihuahua in a special dog sweater for brief walks.If you and your Chihuahua Walking in temperatures below 35 degrees Farenheit is STRONGLY
discouraged, especially when there is a wind-chill factor. In this,
as in other aspects of dog maintenance, keep your dogs’ health top
priority, not your own desires. In fact, in some cold regions, an
indoor heater will be necessary.