Alexander so esteemed his painter that he presented Campaspe to Apelles as a reward for the portrait. The tale of Alexander and Apelles, a favorite of Renaissance and Baroque painters, celebrates the power and nobility of painting. Giovanni Battista Tiepolo painted this episode at least three times.
However even 18 hours is not considered abnormal for a Chihuahua. This includes naps.There are 2 types of sleeping. One is a lighter sleep (called slow wave) and the other is the deeper sleep (known as REM-Rapid Eye Movement). Dogs, just like humans do have these 2 different types of sleep.
The dog sleep behavior depends on the age, breed and personality of the dog. However, on average, dogs sleep 14 hours a day. A dog owner should understand the sleep behavior of the dog, so as to be able to detect any possible problems that are signaled by too much or too little sleep.