How many pets have fur?

It's impossible to give an exact number of pets that have fur. Here's why:

* No Central Registry: There's no global database tracking every pet and their fur status.

* Varying Definitions: What counts as a "pet"? The term includes a wide range of animals, from cats and dogs to hamsters and fish.

* Fur vs. Hair: The difference between fur and hair can be subtle, and some animals may have both.

* Constantly Changing: The number of pets worldwide is constantly changing as people acquire and lose pets.

Instead of a number, we can say:

* A vast majority of popular pet mammals have fur, including dogs, cats, rabbits, hamsters, guinea pigs, and many more.

* Some common pets like birds, reptiles, and fish do not have fur.