To make us laugh. They are very entertaining. We have two cat's.
Why do cats go nutty and chase invisible things?
It's usually a sign when cats are bored and they end up entertaining themselves and making their own fun.My friend's used to say " the cat has the wind in her tail again" lol.
Cats are just like kids when they are young. Kids have imaginary friends and cats have imaginary toys. It's so cute when they do that.