I couldn't come up with a good title, I had a list, but here's just a few:
Why Lelouch hates cat.
Lelouch, cat whisperer.
Geass Fail!
Fail.
Geass Malfunction.
Hey, Lelouch. Geass doesn't work on cats.
I don't know. I've just been working with chibis a lot lately and thought this would be funny!