Personally, I want there to be dogs, but I don't want them to be able to talk. That will lead to the inevitable conversation between Bridget and Rowl.
B: Why can't dogs talk?
R: They used to.
B: Used to? Why don't they any more?
R: Because we cats told them not to.
B: Why did you do that?
R: <flat gaze> Because all they ever said was, "look, I peed there! And there! And there!"
B: <laughs> That can't be true.
R: <ear twitch> No. They also said "I will pee there!" and "Who peed there?!"