Here's why:
* Constant Change: The number of kittens fluctuates constantly due to births, deaths, and adoption rates.
* Global Distribution: Kittens are found all over the world, and keeping track of their numbers across every country is impractical.
* Stray and Feral Populations: A large portion of the kitten population is made up of stray and feral cats, making it even harder to count.
While we can't get an exact number, it's safe to say that there are millions of kittens born every year.