Pitbulls, Rottweilers, Dobermans oh my! Just the mention of those breeds sends chills down some people’s spine. They tend to be aggressive breeds no doubt (especially when the owner is irresponsible), but would you believe that the most aggressive breeds are tiny?
The dog taking the number one spot as the most aggressive breed is the Dachschund (or weiner dog). I know as a young kid my sister got bit by one. She was fearless & picked the dog up & bit it right back (on the back)! It avoided her from then on. 
The number two spot is held by the Chihuahua. No surprise there. Practically every chihuahua I’ve ever met shook terribly & snapped at everyone (including their owner). I was bit by a chihuahua but didn’t even realize it because it bit my pant leg. I only noticed it when the owner (who was yakking on her cell phone) apologized & I felt my pant leg being tugged on.
And the number three spot goes to the Jack Russell terrier. A neighbor has one that lunges at everyone who walks by. He’s bitten quite a few people before the owner can yank him back. Come to think of it, that little terror bit my pant leg too!
Dr. James Serpell, a University of Pennsylvania researcher said smaller breeds might be more genetically predisposed towards aggressive behavior than larger dogs. Not to mention the fact that bites from small dogs are rarely reported.
I believe owners of small dogs that bite are irresponsible if they let their dog bite people…even if they only grab someone’s pant leg. What if they bite a small child? Any dog that bites (big or small) needs the problem corrected.
Read more about the dog aggression study here…
