What does Enzo believe is a unique quality of dogs regarding their owners?

Enzo, the dog character in "The Art of Racing in the Rain," possesses a deep intuition about human emotions, which allows him to sense when his owner is unhappy. This unique awareness highlights the strong bond between dogs and their humans, showcasing how dogs are attuned to the emotional states of their owners. Enzo's observations throughout the narrative emphasize his belief that dogs have an innate ability to empathize, offering comfort and understanding in times of distress. This quality underlines the theme of companionship and support that runs throughout the story, portraying dogs as loyal friends who are sensitive to their owners' feelings.