When I was growing up it was German Shepards that had a bad reputation, now it is Pit Bulls. I have been around and owned many breeds and it was a Cocker Spaniel that ripped out my knee, and the dog knew me. She had just had a litter, I wasn't even in the house, she ran to the door as my friend opened it and the dog attacked me.

I have seen the most docile breed become aggressive because of a bad owner.

I think there are some breeds that are a bit more prone to aggression, yet I know Pit Bull owners who swear their dog is the sweetest thing.

I always go with my instinct when I choose a dog and not necessarily the breed. I actually prefer mixed breeds.

I have a Mackenzie River Husky wolf mix and she is the calmest dog I have ever owned YET she did on one occassion go after my friend when my friend hugged my husband. The dog didn't bite--just a warning on the butt. However, I learned real fast that day that you can never fully anticipate what an animal will do and what will make them kick into protection mode.