Owning a Chihuahua can be a rewarding and fun experience. However, there are certain traits about Chihuahuas that you should be aware of. One specific trait is their ability to sleep a lot. Chihuahuas are a very energetic breed, especially as puppies, so they naturally sleep more often than other breeds. As they get older, they may tire more easily and sleep even more. Chihuahua puppies can sleep up to 18 to 20 hours a day. Sometimes, boredom or illness can also cause excessive sleep. It's important to monitor their sleeping habits and consult a veterinarian if there are any drastic changes. Chihuahuas usually sleep for 12 to 18 hours a day, with some even sleeping under the covers for comfort and safety.