What kind of odor, or smell do rats hate/fear most?

i have rats running around in my attic. i like to scare them away instead of trapping and killing them.What kind of odor, or smell do rats hate/fear most?
Well, the Smell that They really Dislike is ';Fluffy';, the Kitty Cat! But, since You want Them to Fly [away, leave] and not Die, That's not an Option for You, right? Okay, would you Consider a Non-Lethal Audio Approach? The Right type of Sound, Inaudible to You, would solve the Problem. Go to www.amazing1.com They have some of the Coolest High Tech Gadgets anywhere. Do You have a Friend that's into Electronics? It would be much less Expensive to Mail Order whatever Rodent Router Device You need in Kit Form. Just Remember, by not putting ';Fluffy'; to Work, You'll be passing Your Problem off to Someone Else!What kind of odor, or smell do rats hate/fear most?
If they can smell it so will you. Audio would be the way to go - unless you like snakes.
i would say moth ball,s but be aware what goes up must come down. i would kill them