Dog doesn't catch mice, instead chases deer away. Dog tries to steal food when nobody's looking, cat doesn't even get on the counter to try and lick butter. Cat cuddles with me in bed, dog would prefer to sleep on a cooling vent, selfishly blocking cool air to the room. Cat has soft, well-groomed fur. Dog needs a bath every other day or she smells like ass. Cat only scratches when necessary. Dog has no claw-awareness whatsoever. I could go on.