If the dog looked like a pit bull or any type of bully breed, I guarantee you that if it was an actual attack, she wouldn't have escaped without injury.
That being said, I agree with carrying protection against dog attacks.
As uncommon as they may or may not be, I would rather needlessly have protection than think it'd never happen and my dog get injured or killed.
Ozzy - Chocolate Pom
-Fastest 2012 U-FLI Pomeranian
"In a perfect world, every dog would have a home and every home would have a dog."