Oscar, Pavement hurts my pads. Where do you prefer to run, on pavement or dirt? -- Boulder

Boulder, Dirt is better for lots of reasons. One, it's simply more scenic and interesting. Two, dirt often implies fewer cars. Three, dirt is a softer surface, and I know my owner's knees can't handle too much pounding on pavement. Personally, I'll run anywhere -- in fact, I usually prefer to run than walk. Really, my only two speeds are "fast" and "sleeping."

One nice thing about the occasional stint on pavement is that the asphalt rounds off my toenails. That's helpful, because I don't really like using a file.