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.
Age is a major factor in how much a dog sleeps. Just as it is with people, a dog's sleeping patterns change throughout his life cycle, with more or less sleep needed at different stages of life. Healthy adult dogs in their prime of life generally average about 14 hours of sleep each day. Young puppies generally need 18 to 20 hours, while aging dogs also tend to sleep longer the older they get. Dogs who have a lot to do generally sleep less.