By the way....
in the past I have had several cats, but never had a dog. The official excuse is that I haven't the time to walk them twice or three times a day and wouldn't know where to leave them when I am away (which happens often).
But, on a more personal level, I don't like the smell of most dogs (even if I have to admit that Sigfried and Roy were a pleasant exception).
Cats, on the other hand, smell good ... except when they begin to "spray around"...