1. Their teeth fall out.
Maritsa Patrinos / BuzzFeed
They have baby teeth just like humans, so don't panic!
2. Their whiskers also fall out.
Maritsa Patrinos / BuzzFeed
3. They can see ghosts.
Maritsa Patrinos / BuzzFeed
It's science.
4. The five-second rule won't work in your house anymore.
Maritsa Patrinos / BuzzFeed
Don't risk it.
5. They make strange hunting noises.
Maritsa Patrinos / BuzzFeed
6. Black cats are impossible to photograph.
Maritsa Patrinos / BuzzFeed
7. They drool.
Maritsa Patrinos / BuzzFeed
They're just relaxed.
8. The majority of their day is spent sleeping.
Maritsa Patrinos / BuzzFeed
9. They grow up insanely fast.
Maritsa Patrinos / BuzzFeed
So take lots of pictures!