if you need to take your dog anywhere it can't walk on it's own, you probably aren't living a truly carfree lifestyle. a carfree lifestyle, I think, would be one which does not entertain any unnecessary clutter or waste. dogs are inherintly wasteful creatures, and living carfree is about not wasting. cars represent the worst part of american culture, and owning a dog in the city, or infact anywhere it isn't working, is just another aspect of that wasteful, indulgent culture.
yes, it's hard to realize something so special to your life doesn't exactly fit, but that's what living a better life is all about.