10 Crazy Facts You Didn't Know About Animals

Dachshunds Are More Aggressive Than Pit Bulls
This little dachshund is actually more aggressive than a pit bull. iStockphoto/Thinkstock

Common sense says pit bulls are aggressive by nature. Pit bull attacks against humans make the news for their often tragic results.

Turns out, pit bulls are some of the nicer dogs out there. They can't help it if their jaws are ridiculously strong.

A 2008 study conducted at the University of Pennsylvania analyzing thousands of dogs from 33 breeds found that pit bulls were easily topped by none other than wiener dogs -- er, dachshunds -- in terms of bite attacks against people. Of the dachshunds in the study, 20 percent had bitten or attempted to bite strangers, and 6 percent had bitten or attempted to bite their owners, compared to 7 percent and 2 percent, respectively, of the pit bulls. Chihuahuas, Jack Russells and beagles also beat out pit bulls for aggression toward people [source: Duffy, Hsu and Serpell].

Pit bulls did score high in aggressiveness toward other dogs; dachshunds did, too. But combined aggression toward humans and dogs earned wiener dogs the top spot for overall aggression [source: Dobson].