Dog Issue: Raccoon v. Dog

I have raccoons come up to my house. My Aussie Shepherd goes berserk when one comes up to the house. My house has a garage and carport, and she's damaged the kitchen door that leads to the carport trying to get at the raccoon.

She's killed two. She is very quick and hits them at full speed. I think the surprise throws them off. She has had five or six encounters without killing one, as they can go under a car in the driveway and up a nearby tree. My bigger border collie is an older dog and joins in so she has some backup.

She wakes me up when a coon is outside, going nuts. I've been letting her out. Last night she killed one with no damage to her. She's never been injured fighting a coon.

Here's the question and rub: Am I inviting serious injuries or do some dogs simply know how to handle fighting a coon? She kills copperheads and tries to kill possums but quits biting them when they play dead.

Any tips on calming her down would also be helpful. She's normally very calm, but when the "enemy" is in her turf, she goes wild. The carport door used to have a nice strained glass insert but one day I put my sweatshirt over my head to see what she'd do and she bashed the glass out