Then the problem is, who defines "cool dog"? All owners think their dog is cool. All owners think their dog should come with 'em everywhere.
I personally am more of a cat person. We have two cats - mine is Tinkerbell, and my sister's is Shadow. Tinkerbell is about the most mellow cat that I've ever met - she's perfectly calm and tame under most circumstances. I think she'd be a good cat to carry around. Shadow, on the other hand, would be a mess. He likes to do his own thing, no matter what. And, of course, dogs are the same way.
Reminds me of that police dog pic we had a while back - with the cat walking in front of all those dogs, and they're just sitting there. If your dog can do THAT, then you can bring it along
