Please don't tell Trevor and Andy that I did this, but I voted for dogs. I know that there are lots of things that cats understand and could respond to if they so chose. I think there is a lot going on in their furry little minds that we will never know. I know there are exceptions to every rule, but on the whole I do believe that dogs are wired a little differently which appears to make them smarter. (Trevor and Andy, if you see this please know that I still love you guys very, very much! LOL!)