He was scared of dogs. when he was little, he got bit by one and never got over it.
He feared CATS
Napoleon, like Julius Caesar and Henry II, suffered from ailurophobia, the fear of cats.
Chihuahua puppies
Some famous people known to have an irrational fear of cats (ailurophobia) include Napoleon Bonaparte, Alexander the Great, and Julius Caesar. These historical figures are said to have had varying degrees of fear or aversion towards cats.
Not as far as we know. He has expressed a preference for dogs, and his family has two pet dogs. But he has been photographed petting cats, and does not seem to be afraid of them.
Dogs and cats have different responses to fear and pleasure. When dogs are happy they wag their tails. Cats purr when they are happy. When dogs are scared they growl. Cats also growl when they are scared.
Ailurophobia - The fear of cats
Cats
Ailurophobia is a type of specific phobia. It is a persistent, irrational fear of cats. Napoleon was absolutely terrified of cats. He was known to be afraid of cats to such a degree that even when a kitten entered the room, he would jump up on the footstool until the cat was removed from his sight.
Even though cats and dogs can sense many things before they happen, they don't know when thunder booms, therefore, they naturally jump from fear.
Dogs can possibly fear clowns, because animals fear to survive. For example, cats fear things that chase them. So when a cat's predator chases the cat, the cat's fear would cause it to run away, allowing it to survive. Though clowns are supposed to be nice people, dogs can misinterpret, because dogs don't understand the purpose of clowns.
The same reason some are afraid of dogs or cats. They look or sound scary to them.