Cats are omnivores.

To many people, cats are a lot cuter than dogs. Their almond-shaped eyes, small noses, medium ears, small paws, and variety of fur colors are the most noticed features. 

When they sleep, they often sleep on their sides, with their paws at their muzzles or chest. This creates a toddler type appearence. To cat lovers, this appearence makes them feel happy, which, in return, makes them see the cat as cute. 

As you know, the sleeping cat has a toddler type appearence. This then activates a special hormone in a human's gland, creating a sense of well-being, or friendship. This feeling is stimulated through the brain as motherly or fatherly love, which makes the cat's appearance levels rise. This makes the cat seem cuter to the human. 

Cats and dogs are cute due to the reasoning that they are good for humans. Cats kept away rats that carried illnesses in the past, and dogs kept away any dangerous animals and humans. So it should come as an instinct for most of us to love them.