Geeze you're all missing the boat here! There needs to be a total ban on Shih Tzu's. It's as clear as the nose on that ladies face!
Okay, kidding, but seriously this is why breed specific bans are so bloody ridiculous. Home Depot will let you bring your dog in, but it doesn't mean you necessarily should. We need a ban on stupid owners. Oh and that ladies face does not look like she got nipped either. That was a pretty nasty bite. The owner of the dog does need to be held responsible, and the dog probably does need a muzzle (thanks to the stupid owner).