Everyone knows that Seattle is a dog-loving city, but not every dog is a cuddly, floppy-eared bundle of joy. Just ask the U.S. Postal Service — they'll tell you Fido can also be a threat.

The Postal Service released information on nationwide dog bite rates in recognition of Dog Bite Prevention Week, May 15-21. With 28 attacks in 2010, Seattle ranks No. 10 in the nation for the most dog attacks.

Showing that attack rates have little to do with geography, Houston tops the list with 62 attacks, followed by Columbus, Ohio and San Diego, Calif., with 45 attacks each. Other cities cited as having bad doggies include, Los Angeles, Louisville, Ky., San Antonio, Texas, Minneapolis, Minn., and Portland, Ore., among others.

The situation is no laughing matter to the Postal Service or the 5,669 postal employees who were attacked last year. The Postal Service said the attacks cost nearly $1.2 million in medical expenses while the Insurance Information Institute said that nearly one-third of homeowners' liability claims are from dog attacks and cost nearly $413 million last year.

Ryan Bradford, a San Diego letter carrier, has documented a number of the dogs he's encountered on his delivery route in his blog posting "All the Dogs Want to Kill Me."

It is estimated that there are 72 million pet dogs in the U.S. and that 4.7 million Americans are bitten by a dog every year.