The cooler weather here in the Twin Cities has got some of the wildlife looking for a warm place to hole up for the winter.  If a local squirrel or two has targeted your attic, you'll want to get that critter out as soon as possible.  Squirrels can make for noisy tenants, not to mention the damage they can cause.

You could call an exterminator, but before you go to that expense, there may be some steps you can take yourself.  "The Home Forum" has some great tips on getting squirrels out.  They recommend you contact the local county extension office, but the article also lists some things you can do yourself.

If you do have squirrels or other wildlife getting into your attic, you may have some roof damage that gave them access.  It's a good idea to have your roof inspected and any damage repaired to keep them from coming back.