My cat is obsessed with the paranormal

My cat is obsessed with things that don't really exist. She chases shadows and reflections with an almost disturbing amount of zeal.
But if a real mouse walked into the room, she would ignore it as if it was just a new piece of furniture I had bought.
All she would think, "Where is the box it came in? I like to sit in boxes. Where is the box?"
It's a mouse. Your natural enemy. It doesn't come in a box. Just go and kill it, you daft cat.
"I'm hungry. Where's my food?"
So I go and feed her.
I swear, I came home from work one day and found a little bird flying around my house.
Lucy was sitting there totally oblivious. If it was a tin of Felix with wings, flying about my living room she might have attacked it.
But, no.
Daft, useless cat.