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What are the top dogs in your city?

By: Noel Kirkpatrick on Feb. 3, 2011, 6:17 a.m.

Photo: elisfanclub/Flickr

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Portland: Chihuahua

The fourth most popular breed in Portland, Ore., the Chihuahua is a tiny dog that's ideal for city living. Despite its reputation as a self-confident "purse dog," the breed is intelligent and generally friendly — provided it is treated in the same fashion.